Works (165)

Updated: April 4th, 2024 21:49

2023 article

Enhanced Crash Frequency Models Using Surrogate Safety Measures from Connected Vehicle Fleet

Lee, T., & Rouphail, N. (2023, July 31). TRANSPORTATION RESEARCH RECORD.

By: T. Lee* & N. Rouphail n

author keywords: data and data science; urban transportation data and information systems; big data; connected vehicle data applications; probe vehicle data
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 14, 2023

2023 article

Modeling Framework for Predicting Lane Change Intensity at Freeway Weaving Segments

Ahmed, I., Karr, A., Rouphail, N. M., & Chase, R. T. (2023, April 19). TRANSPORTATION RESEARCH RECORD, Vol. 4.

By: I. Ahmed n, A. Karr, N. Rouphail* & R. Chase n

author keywords: data and data science; statistical methods; modeling; operations; freeway operations; highway capacity and quality of service; freeways
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 20, 2023

2023 article

Response time of mixed platoons with traditional and autonomous vehicles in field trials: impact assessment on flow stability and safety

Das, T., Ahmed, I., Williams, B. M., & Rouphail, N. M. (2023, December 29). TRANSPORTMETRICA A-TRANSPORT SCIENCE, Vol. 12.

By: T. Das n, I. Ahmed*, B. Williams n & N. Rouphail n

author keywords: Response time; mixed traffic; traffic flow stability; rear-end crash risk; adaptive cruise control; manufacturer heterogeneity
Sources: Web Of Science, NC State University Libraries, ORCID
Added: January 16, 2024

2023 journal article

Surrogate Safety Measures: Review and Assessment in Real-World Mixed Traditional and Autonomous Vehicle Platoons

IEEE ACCESS, 11, 32682–32696.

By: T. Das n, M. Samandar, M. Autry n & N. Rouphail n

author keywords: Mixed traffic; surrogate safety measures; real-world mixed traffic dataset; autonomous vehicles; connected vehicles; connected-autonomous vehicles
Sources: Web Of Science, NC State University Libraries, ORCID
Added: May 15, 2023

2022 article

Analytical and Microsimulation Model Calibration and Validation: Application to Roundabouts under Sight-Restricted Conditions

Chun, G., Rouphail, N., Samandar, M. S., List, G., Yang, G., & Akcelik, R. (2022, August 21). TRANSPORTATION RESEARCH RECORD, Vol. 8.

By: G. Chun n, N. Rouphail n, M. Samandar, G. List n, G. Yang* & R. Akcelik

author keywords: operations; calibration; validation; macroscopic traffic simulation; microscopic traffic simulation
TL;DR: The calibration and validation efforts associated with an analytical platform, SIDRA 9, and a microsimulation model, TransModeler 5, conducted under sight-restricted conditions are explored, confirming the value of model calibration in more accurately describing field performance. (via Semantic Scholar)
UN Sustainable Development Goal Categories
1. No Poverty (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 29, 2022

2022 article

Capitalizing on Drone Videos to Calibrate Simulation Models for Signalized Intersections and Roundabouts

Samandar, M. S., Chun, G., Yang, G., Chase, T., Rouphail, N. M., & List, G. F. (2022, June 24). TRANSPORTATION RESEARCH RECORD, Vol. 6.

By: M. Samandar n, G. Chun n, G. Yang n, T. Chase n, N. Rouphail n & G. List n

author keywords: macroscopic traffic simulation; microscopic traffic simulation; traffic operations; unmanned aerial systems
TL;DR: This paper illustrates how modeling teams can use drone data to calibrate model parameters pertaining to intersection operation and shows how saturation flow rates can be adjusted for signalized intersections so that queue dynamics and delays can be matched. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: July 5, 2022

2022 article

Characterizing lane changing behavior and identifying extreme lane changing traits

Ahmed, I., Karr, A. F., Rouphail, N. M., Chase, R. T., & Tanvir, S. (2022, April 24). TRANSPORTATION LETTERS-THE INTERNATIONAL JOURNAL OF TRANSPORTATION RESEARCH, Vol. 4.

By: I. Ahmed n, A. Karr, N. Rouphail n, R. Chase n & S. Tanvir*

author keywords: Driver behavior; extreme lane change maneuver; passing; NGSIM; false lane changes; congestion level; lane change frequency; trajectory visualization
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 27, 2022

2022 journal article

Longitudinal traffic conflict analysis of autonomous and traditional vehicle platoons in field tests via surrogate safety measures

ACCIDENT ANALYSIS AND PREVENTION, 177.

By: T. Das n, M. Samandar & N. Rouphail n

author keywords: Autonomous Vehicles; Adaptive Cruise Control; Surrogate Safety Measures; AV Platoons; Real-World Mixed Traffic Dataset; Mixed Platoons
MeSH headings : Accidents, Traffic / prevention & control; Algorithms; Automobile Driving; Humans; Reproducibility of Results; Safety
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: November 28, 2022

2022 article

Movement-based intersection crash frequency modeling

Lee, T., Cunningham, C., & Rouphail, N. (2022, June 21). JOURNAL OF TRANSPORTATION SAFETY & SECURITY.

By: T. Lee n, C. Cunningham n & N. Rouphail n

author keywords: Traffic safety; crash frequency model; intersection crashes; traffic movement; movement-based crash frequency model
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: July 11, 2022

2021 journal article

Capacity Analysis Framework for Freeway Ramp Weaves

JOURNAL OF TRANSPORTATION ENGINEERING PART A-SYSTEMS, 147(12).

By: E. Amini*, D. Xu n, N. Rouphail n, L. Elefteriadou* & B. Aghdashi*

author keywords: Highway capacity manual; Freeway weaving analysis; Freeway systems analysis
TL;DR: The Highway Capacity Manual 6th Edition provides methods for evaluating freeway segments and facilities, including weave segments, including weaving segments, which cast doubt on the validity of previous research. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: November 1, 2021

2021 article

Dynamically Collected Local Density using Low-Cost Lidar and its Application to Traffic Models

Avr, A., Tanvir, S., Rouphail, N. M., & Ahmed, I. (2021, May 6). TRANSPORTATION RESEARCH RECORD, Vol. 5.

By: A. Avr n, S. Tanvir*, N. Rouphail n & I. Ahmed n

UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 30, 2021

2021 journal article

Evaluating the Effect of Incidents on Freeway Facilities and Updating the Incident Capacity Adjustments for HCM

TRANSPORTATION RESEARCH RECORD, 2675(1), 224–234.

By: J. Addison n, S. Aghdashi* & N. Rouphail n

TL;DR: By applying a genetic algorithm calibration method on each incident day and calibrating the incident capacity adjustment factors (CAFs), optimal time-dependent CAFs were derived that best represented the effect of incidents on the freeway segment capacity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: March 15, 2021

2021 journal article

Impacts of Private Autonomous and Connected Vehicles on Transportation Network Demand in the Triangle Region, North Carolina

JOURNAL OF URBAN PLANNING AND DEVELOPMENT, 147(1).

By: M. Hasnat n, E. Bardaka n, M. Samandar n, N. Rouphail n, G. List n & B. Williams n

Contributors: M. Hasnat n, E. Bardaka n, M. Samandar n, N. Rouphail n, G. List n & B. Williams n

UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: February 1, 2021

2021 journal article

Mobility Assessment of Pedestrian and Bicycle Treatments at Complex Continuous Flow Intersections

JOURNAL OF TRANSPORTATION ENGINEERING PART A-SYSTEMS, 147(5).

By: I. Ahmed n, S. Warchol*, C. Cunningham n & N. Rouphail n

author keywords: Continuous flow intersection; Displaced left turn; Alternative intersection; Pedestrian; Exclusive bicycle path; Stopped delay; Number of stops
TL;DR: This study evaluated the mobility performance of pedestrian-bicycle crossing alternatives at continuous flow intersections (CFIs) by comparing CFI crossing types with a standard intersecting pattern. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: June 23, 2021

2020 article

Assessing the impact of closely-spaced intersections on traffic operations and pollutant emissions on a corridor level (vol 54, pg 304, 2017)

Fernandes, P., Coelho, M. G., & Rouphail, N. M. (2020, October). TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, Vol. 87.

By: P. Fernandes*, M. Coelho* & N. Rouphail n

UN Sustainable Development Goal Categories
Source: Web Of Science
Added: December 21, 2020

2020 journal article

Crash Classification by Congestion Type for Highways

APPLIED SCIENCES-BASEL, 10(7).

By: T. Song*, S. Kim*, B. Williams n, N. Rouphail n & G. List n

author keywords: collision classification; recurrent and non-recurrent congestion; link speed data; traffic safety; advanced traffic management system
TL;DR: An easily implementable methodology that can classify all reported crashes in terms of the operational conditions under which each crash occurred is presented, which makes use of a novel scheme for distinguishing between recurrent and non-recurrent congestion. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: July 6, 2020

2020 journal article

Modeling Framework for Capacity Analysis of Freeway Segments: Application to Ramp Weaves

TRANSPORTATION RESEARCH RECORD, 2674(1), 148–159.

By: D. Xu n, N. Rouphail n, B. Aghdashi n, I. Ahmed n & L. Elefteriadou*

Contributors: D. Xu n, N. Rouphail n, B. Aghdashi n, I. Ahmed n & L. Elefteriadou*

TL;DR: A new modeling framework for the analysis of freeway segments that distinguishes between congestion effects caused by high v/c ratios from turbulence caused by merging, diverging, and weaving traffic, thus greatly simplifying the model form and its extensibility to other freeway segment types. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: February 3, 2020

2019 article

Assessing traffic-related environmental impacts based on different traffic monitoring applications

21ST EURO WORKING GROUP ON TRANSPORTATION MEETING (EWGT 2018), Vol. 37, pp. 107–114.

author keywords: Traffic-related environmental impacts; Emissions; VSP
TL;DR: A methodological approach to assess the capability of different traffic monitoring applications to estimate emissions generated by road traffic and results show a prediction for CO2 emissions of 99% and 98% to NOX. (via Semantic Scholar)
Source: Web Of Science
Added: July 1, 2019

2019 journal article

Characterizing Lane Changes via Digitized Infrastructure and Low-Cost GPS

TRANSPORTATION RESEARCH RECORD, 2673(8), 298–309.

By: I. Ahmed n, A. Karr*, N. Rouphail n, G. Chun n & S. Tanvir n

Contributors: I. Ahmed n, A. Karr*, N. Rouphail n, G. Chun n & S. Tanvir n

TL;DR: Analysis of naturalistic trajectory data revealed that ramp-to-freeway trips had the highest number of discretionary lane changes in excess of 1 lane change/vehicle, and excessive lane change rates were highest between the two middle freeway lanes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
9. Industry, Innovation and Infrastructure (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: October 14, 2019

2019 journal article

Lane Change Rates at Freeway Weaving Sites: Trends in HCM6 and from NGSIM Trajectories

TRANSPORTATION RESEARCH RECORD, 2673(5), 627–636.

By: I. Ahmed n, D. Xu n, N. Rouphail n & A. Karr*

Contributors: I. Ahmed n, D. Xu n, N. Rouphail n & A. Karr*

TL;DR: Analysis of HCM6 lane change patterns at the NGSIM site revealed a tendency for early merging for freeway to ramp traffic and uniform merging for ramp to freeway traffic over the length of the weave, and a speed analysis showed that a higher frequency of discretionary lane changes yielded lower travel times for drivers executing them. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: July 15, 2019

2019 journal article

Queue-Based Guidance for Signalization Consideration at Two and Three-Legged Intersections

TRANSPORTATION RESEARCH RECORD, 2673(10), 416–426.

By: S. Warchol n, N. Rouphail n, C. Vaughan n & B. Kearns n

TL;DR: A data-driven method for determining the need for considering additional signalization analysis at intersections with fewer than four legs is developed, similar to the delay-based level of service D/E threshold for two-way stop-controlled intersections in HCM6 Chapter 19. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: January 6, 2020

2018 journal article

Characteristics and Temporal Stability of Recurring Bottlenecks

TRANSPORTATION RESEARCH RECORD, 2672(42), 235–246.

By: I. Ahmed n, N. Rouphail n & S. Tanvir n

Contributors: I. Ahmed n, N. Rouphail n & S. Tanvir n

TL;DR: A systematic framework is developed for tracking and archiving the spatiotemporal changes in the recurring bottlenecks and the influence of a long-term work zone in the area and the effect of the rapid growth in traffic demand are revealed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: June 4, 2019

2018 journal article

Data-driven approach for identifying spatiotemporally recurrent bottlenecks

IET INTELLIGENT TRANSPORT SYSTEMS, 12(8), 756–764.

By: T. Song*, B. Williams n & N. Rouphail n

Contributors: T. Song*, B. Williams n & N. Rouphail n

TL;DR: A data-driven approach for identifying recurrent bottlenecks is introduced, using probe vehicle speed reports, and the characteristics determined the recurrent bottleneck locations with a historical time span of bottleneck activation are revealed and tested. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: October 16, 2018

2018 journal article

Effect of Light Duty Vehicle Performance on a Driving Style Metric

TRANSPORTATION RESEARCH RECORD, 2672(25), 67–78.

By: S. Tanvir n, H. Frey n & N. Rouphail n

Contributors: S. Tanvir n, H. Frey n & N. Rouphail n

TL;DR: Findings from this study imply that the choice of vehicle does not significantly alter the natural driving style of a driver, and develops a metric for driving style termed “envelope deviation,” which is a distribution of gaps between microscale activity (1 Hz) and fleet average envelope. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: May 28, 2019

2018 journal article

Reliability Assessment Tool: Development and Prototype Testing

TRANSPORTATION RESEARCH RECORD, 2672(14), 29–38.

By: G. List n, N. Rouphail n, R. Smith n & B. Williams n

Contributors: G. List n, N. Rouphail n, R. Smith n & B. Williams n

TL;DR: A monitoring system that was developed to assess travel time reliability for observed operating conditions by utilizing traffic stream and non-transportation related data is presented. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: May 28, 2019

2018 journal article

Simulation of Work Zones with Lane Closures in Proximity of Freeway Interchanges

IEEE INTELLIGENT TRANSPORTATION SYSTEMS MAGAZINE, 10(3), 184–195.

By: C. Yeom*, W. Rasdorf n, N. Rouphail n & B. Schroeder*

TL;DR: The paper illustrates how ramp demand affects the share of segment capacity available to mainline traffic to reveal strategies for controlling this demand (via ramp metering for example) in order to maintain a prescribed freeway capacity through the work zone. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: October 19, 2018

2018 journal article

Validation and Calibration of Freeway Reliability Methodology in the Highway Capacity Manual: Method and Case Studies

TRANSPORTATION RESEARCH RECORD, 2672(15), 93–104.

By: N. Karmakar n, S. Aghdashi n, N. Rouphail n & B. Williams n

Contributors: N. Karmakar n, S. Aghdashi n, N. Rouphail n & B. Williams n

TL;DR: Practical calibration and validation methods of the core and reliability analyses described in the Highway Capacity Manual are focused on to provide HCM users with guidance on collecting data for freeway reliability analysis as well as validating the reliability performance measures predictions of the HCM methodology. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: June 4, 2019

2017 journal article

Application of high-resolution vehicle data for free-flow speed estimation

Transportation Research Record, (2615), 105–112.

By: N. Rouphail, S. Kim & S. Aghdashi

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Assessing the impact of closely-spaced intersections on traffic operations and pollutant emissions on a corridor level

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 54, 304–320.

By: P. Fernandes*, M. Coelho* & N. Rouphail n

author keywords: Intersections; Multi-objective optimization; Micro-scale modeling; Spacing
TL;DR: A method to improve corridor performance and emissions was tested by examining the integrated effect of the spacing between these intersections on traffic delay and vehicular emissions. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Freeway work zone free-flow speed model development

ITE Journal, 87(11), 38–44.

By: C. Yeom, A. Hajbabaie, N. Rouphail, W. Rasdorf & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Lane utilization model development for diverging diamond interchanges

Transportation Research Record, (2618), 27–37.

By: C. Yeom, B. Schroeder, C. Cunningham, K. Salamati & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Multi-scenario optimization approach for assessing the impacts of advanced traffic information under realistic stochastic capacity distributions

TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES, 77, 113–133.

author keywords: Stochastic road capacity; Traffic assignment; Travel time variability; Value of dynamic traveler information; Risk-sensitive route choice behavior
TL;DR: A nonlinear programming model is formulated to describe the route choice behavior of the perfect information and expected travel time user classes under stochastic day-dependent travel time. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Quantifying travel time variability at a single bottleneck based on stochastic capacity and demand distributions

JOURNAL OF INTELLIGENT TRANSPORTATION SYSTEMS, 21(2), 79–93.

By: M. Li*, X. Zhou* & N. Rouphail n

author keywords: bottleneck; stochastic capacity; stochastic demand; travel time variability
TL;DR: A volume- to-capacity ratio-based travel time function and a point queue model are used to demonstrate how day-to-day travel time variability can be explained from the underlying demand and capacity variations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

The effect of a roundabout corridor's design on selecting the optimal crosswalk location: A multi-objective impact analysis

INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION, 11(3), 206–220.

By: P. Fernandes*, K. Salamati n, N. Rouphail n & M. Coelho*

author keywords: CO2; crosswalks; local pollutants; multi-objective optimization; roundabout corridors; spacing
TL;DR: A multi-objective analysis of pedestrian crosswalk locations yielded improvements to both delay and emissions by using site-optimized crosswalks, and revealed that the spacing between intersections widely influenced the optimal crosswalk location along a mid-block section. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Turboroundabouts along corridors analysis of operational and environmental impacts

Transportation Research Record, (2627), 46–56.

By: P. Fernandes, N. Rouphail & M. Coelho

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Dynamic Bandwidth Analysis for Coordinated Arterial Streets

JOURNAL OF INTELLIGENT TRANSPORTATION SYSTEMS, 20(3), 294–310.

By: S. Kim n, A. Hajbabaie*, B. Williams n & N. Rouphail n

Contributors: S. Kim n, A. Hajbabaie*, B. Williams n & N. Rouphail n

TL;DR: Detailed analysis at three arterial sites revealed that coordinated green phase time distributions are complex and multimodal and cannot be represented by a single-valued statistic, and dynamic bandwidth analysis confirmed that programmed green bandwidth consistently underestimates the size of the actual dynamic bandwidth. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Eco-system optimal time-dependent flow assignment in a congested network

TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 94, 217–239.

By: C. Lu*, J. Liu*, Y. Qu*, S. Peeta*, N. Rouphail n & X. Zhou*

author keywords: Green transportation; Vehicular emission modeling; Eco-routing; Marginal emission; Multi-scale dynamic network loading
TL;DR: This research proposes a generic agent-based ESODTA model and a simplified queueing model that is able to clearly distinguish vehicles’ speed in free-flow and congested conditions for multi-scale emission analysis, and develops an algorithm for evaluating path marginal emissions in a congested network. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Enhanced Decision-Making Framework Using Reliability Concepts for Freeway Facilities

Journal of Transportation Engineering, 142(4), 04016008.

By: A. Hajbabaie*, S. Aghdashi n & N. Rouphail n

Contributors: A. Hajbabaie*, S. Aghdashi n & N. Rouphail n

author keywords: Travel time reliability; Decision-making framework; Highway capacity manual
UN Sustainable Development Goal Categories
Sources: Crossref, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Exploring the association of rear-end crash propensity and micro-scale driver behavior

SAFETY SCIENCE, 89, 45–54.

By: S. Kim n, T. Song n, N. Rouphail n, S. Aghdashi n, A. Amaro & G. Goncalves

author keywords: Rear end crashes; In-vehicle sensing; Driver behavior; Safety
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Integrated indicator to evaluate vehicle performance across: Safety, fuel efficiency and green domains

ACCIDENT ANALYSIS AND PREVENTION, 92, 153–167.

By: G. Torrao*, T. Fontes*, M. Coelho* & N. Rouphail n

author keywords: Integrated analysis; User profile; Crash severity; Vehicle performance
MeSH headings : Accidents, Traffic; Automobiles; Databases, Factual; Decision Making; Environmental Pollution / prevention & control; Gasoline; Humans; Logistic Models; Models, Theoretical; Portugal; Safety; Transportation
TL;DR: The achieved results demonstrate that the developed SEG integrated methodology can be a helpful tool for consumers to evaluate their vehicle selection through different domains (safety, fuel efficiency and green emissions). (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Long-term monitoring of wrong-way maneuvers at diverging diamond interchanges

Transportation Research Record, (2484), 129–139.

By: C. Vaughan, C. Jagadish, S. Bharadwaj, C. Cunningham, B. Schroeder, J. Hummer, D. Findley, N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Modeling freeway work zones with mesoscopic dynamic traffic simulator validation, gaps, and guidance

Transportation Research Record, (2567), 122–130.

By: S. Tanvir, N. Karmakar, N. Rouphail & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Simulation guidance for calibration of freeway lane closure capacity

Transportation Research Record, (2553), 82–89.

By: C. Yeom, N. Rouphail, W. Rasdorf & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2016 journal article

Traffic restriction policies in an urban avenue: A methodological overview for a trade-off analysis of traffic and emission impacts using microsimulation

INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION, 10(3), 201–215.

author keywords: Emissions; integrated platform; microscopic simulation; traffic restriction measures
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Assessment of corridors with different types of intersections environmental and traffic performance analysis

Transportation Research Record, (2503), 39–50.

By: P. Fernandes, T. Fontes, M. Neves, S. Pereira, J. Bandeira, N. Rouphail, M. Coelho

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Generating scenarios of freeway reliability analysis hybrid approach

Transportation Research Record, (2483), 148–159.

By: S. Aghdashi, A. Hajbabaie, B. Schroeder, J. Trask & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Generic speed-flow models for basic freeway segments on general-purpose and managed lanes in undersaturated flow conditions

Transportation Research Record, (2483), 102–110.

By: S. Aghdashi, N. Rouphail, A. Hajbabaie & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Identification of emission hotspots in roundabouts corridors

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 37, 48–64.

By: P. Fernandes, K. Salamati*, N. Rouphail* & M. Coelho

author keywords: Roundabout corridor; Emissions; Vehicle Specific Power; Microscale analysis
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Innovative work zone capacity models from nationwide field and archival sources

Transportation Research Record, (2485), 51–60.

By: C. Yeom, A. Hajbabaie, B. Schroeder, C. Vaughan, X. Xuan & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Integrating a simplified emission estimation model and mesoscopic dynamic traffic simulator to efficiently evaluate emission impacts of traffic management strategies

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 37, 123–136.

By: X. Zhou*, S. Tanvir n, H. Lei*, J. Taylor*, B. Liu n, N. Rouphail n, H. Frey n

Contributors: X. Zhou*, S. Tanvir n, H. Lei*, J. Taylor*, B. Liu n, N. Rouphail n, H. Frey n

author keywords: Emission estimation; Dynamic traffic assignment; Integrated traffic emission model; Cross-resolution model
TL;DR: A computationally efficient and theoretically rigorous dynamic traffic assignment (DTA) model and its solution algorithm for a number of emerging emissions and fuel consumption related applications that require both effective microscopic and macroscopic traffic stream representations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2015 journal article

Long-term monitoring of wrong-way maneuvers at diverging diamond interchanges

Transportation Research Record, (2484), 129–139.

By: C. Vaughan, C. Jagadish, S. Bharadwaj, C. Cunningham, B. Schroeder, J. Hummer, D. Findley, N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Method for investigating intradriver heterogeneity using vehicle trajectory data: A Dynamic Time Warping approach

TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 73, 59–80.

By: J. Taylor*, X. Zhou*, N. Rouphail n & R. Porter*

author keywords: Dynamic Time Warping; Car-following model; Driver behavior heterogeneity; Vehicle trajectory data
TL;DR: This paper attempts to examine driver heterogeneity in car-following behavior, as well as the driver’s heterogeneous situation-dependent behavior within a trip, based on the calibrated time-varying response times and critical jam spacing of the Dynamic Time Warping algorithm. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Multicriteria assessment of crosswalk location in urban roundabout corridors

Transportation Research Record, (2517), 37–47.

By: P. Fernandes, T. Fontes, S. Pereira, N. Rouphail & M. Coelho

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

On the Treatment of Trucks for Analysis of Freeway Capacity

TRANSPORTATION RESEARCH RECORD, (2483), 120–129.

By: G. List n, B. Yang n & N. Rouphail n

UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Planning-level methodology for freeway facilities

Transportation Research Record, (2483), 47–56.

By: A. Hajbabaie, N. Rouphail, B. Schroeder & R. Dowling

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Probit-based pedestrian gap acceptance model for midblock crossing locations

Transportation Research Record, (2519), 128–136.

By: S. Mamidipalli, V. Sisiopiku, B. Schroeder, L. Elefteriadou, K. Salamati & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Simplified method for comparing emissions in roundabouts and at signalized intersections

Transportation Research Record, (2517), 48–60.

By: K. Salamati, N. Rouphail, H. Frey, B. Liu & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Application of AIMSUN microsimulation model to estimate emissions on signalized arterial corridors

Transportation Research Record, (2428), 75–86.

By: A. Anya, N. Rouphail, H. Frey & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Empirical assessment of route choice impact on emissions over different road types, traffic demands, and driving scenarios

International Journal of Sustainable Transportation, 10(3), 271–283.

author keywords: Congestion; eco-routing; emissions; microscope modeling; route choice; vehicle-specific power
Source: Crossref
Added: August 28, 2020

2014 journal article

Lane utilization at two-lane arterial approaches to double crossover diamond interchanges

Transportation Research Record, (2461), 103–112.

By: C. Yeom, B. Schroeder, C. Cunningham, C. Vaughan, N. Rouphail & J. Hummer

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Modeling the impact of subject and opponent vehicles on crash severity in two-vehicle collisions

Transportation Research Record, (2432), 53–64.

By: G. Tarrao, M. Coelho & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Deterministic framework and methodology for evaluating travel time reliability on freeway facilities

Transportation Research Record, (2396), 61–70.

By: B. Schroeder, N. Rouphail & S. Aghdashi

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Development of an oversaturated speed-flow model based on the highway capacity manual

Transportation Research Record, (2395), 41–48.

By: Y. Xu, B. Williams, N. Rouphail & R. Chase

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Emissions estimation at multilane roundabouts effects of movement and approach lane

Transportation Research Record, (2389), 12–21.

By: K. Salamati, M. Coelho, P. Fernandes, N. Rouphail, H. Frey & J. Bandeira

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Enhancements to the freeway facilities method in the highway capacity manual to enable reliability analysis

Transportation Research Record, (2395), 21–30.

By: S. Sajjadi, B. Schroeder & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Estimation of incident propensity for reliability analysis in the highway capacity manual

Transportation Research Record, (2395), 123–131.

By: S. Aghdashi, N. Rouphail & A. Hajbabaie

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Event-based modeling of driver yielding behavior to pedestrians at two-lane roundabout approaches

Transportation Research Record, (2389), 1–11.

By: K. Salamati, B. Schroeder, D. Geruschat & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Lane Choice Model for Signalized Intersections with an Auxiliary Through Lane

JOURNAL OF TRANSPORTATION ENGINEERING, 139(4), 371–378.

By: Z. Bugg n, N. Rouphail n & B. Schroeder n

author keywords: Auxiliary through lane; Operations; Intersection design; Discrete choice model; Microsimulation; Lane choice algorithm
TL;DR: Empirically developed models for driver lane choice at signalized intersection approaches with one ATL and one continuous through lane (CTL) suggest that the utility of the ATL is a function of each through-movement driver’s arrival time. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Temporal stability of generation choice models

Transportation Research Record, (2344), 79–87.

By: L. Huntsinger & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Trip Generation Models Using Cumulative Logistic Regression

JOURNAL OF URBAN PLANNING AND DEVELOPMENT, 139(3), 176–184.

By: L. Huntsinger*, N. Rouphail n & P. Bloomfield n

author keywords: Transportation models; Travel demand; Forecasting; Logistics; Transportation models; Trip generation; Travel demand; Trip forecasting; Data analysis; Planning
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2012 journal article

An analytical framework for managed lane facility performance evaluation

ITE Journal, 82(10), 30–36.

By: X. Liu, Y. Wang, B. Schroeder & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Comparative Evaluation of Reported Speeds from Corresponding Fixed-Point and Probe-Based Detection Systems

TRANSPORTATION RESEARCH RECORD, (2308), 110–119.

By: R. Chase n, B. Williams n, N. Rouphail n & S. Kim n

Contributors: R. Chase n, B. Williams n, N. Rouphail n & S. Kim n

UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2012 journal article

Effect of pedestrian impedance on vehicular capacity at multilane roundabouts with consideration of crossing treatments

Transportation Research Record, (2312), 14–24.

By: B. Schroeder, N. Rouphail, K. Salamati & Z. Bugg

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Generating Emissions Information for Route Selection: Experimental Monitoring and Routes Characterization

Journal of Intelligent Transportation Systems, 17(1), 3–17.

By: J. Bandeira*, T. Almeida*, A. Khattak*, N. Rouphail* & M. Coelho*

author keywords: Driving Behavior; Emissions; Route Choice; Vehicle Specific Power (VSP)
TL;DR: It was found that the choice of a route can substantially affect emission rates of the analysed pollutants and that smoother driving styles can also result in considerable emissions reduction, which has implications for future investment and policy decisions regarding eco routing strategies. (via Semantic Scholar)
Source: Crossref
Added: August 28, 2020

2012 journal article

Guidance for simulation-based modeling of auxiliary through lanes

Transportation Research Record, (2311), 51–58.

By: Z. Bugg, N. Rouphail & B. Schroeder

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Quantifying cross-weave impact on capacity reduction for freeway facilities with managed lanes

Transportation Research Record, (2278), 171–179.

By: X. Liu, Y. Wang, B. Schroeder & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Simulator study of driver responses to pedestrian treatments at multilane roundabouts

Transportation Research Record, (2312), 67–75.

By: K. Salamati, B. Schroeder, N. Rouphail, C. Cunningham, Y. Zhang & D. Kaber

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Temporal stability of freeway macroscopic traffic stream models

Transportation Research Record, (2315), 131–140.

By: C. Liu, B. Williams & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Traffic mobility impact of mileage-based user fees on traveler route choice behavior and network performance planning-level traffic equilibrium-based approach

Transportation Research Record, (2302), 164–173.

By: A. Jia, X. Zhou & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2012 journal article

Value of life cycle in explaining trip-making behavior and improving temporal stability of trip generation models

Transportation Research Record, (2322), 60–69.

By: L. Huntsinger & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Analyzing operational improvements as an alternative to traditional highway construction

Transportation Research Record, (2223), 18–25.

By: W. Kittelson, N. Rouphail, B. Williams & X. Zhou

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Bottleneck and queuing analysis calibrating volume-delay functions of travel demand models

Transportation Research Record, (2255), 117–124.

By: L. Huntsinger & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Development and implementation of conflict-based assessment of pedestrian safety to evaluate accessibility of complex intersections

Transportation Research Record, (2264), 148–155.

By: K. Salamati, B. Schroeder, N. Rouphail, C. Cunningham, R. Long & J. Barlow

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Development of a modal emissions model for a hybrid electric vehicle

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 16(6), 444–450.

By: H. Zhai*, H. Frey n & N. Rouphail n

Contributors: H. Zhai*, H. Christopher Frey n & N. Rouphail n

author keywords: Hybrid electric vehicle; Emissions; Driving cycle; Carbon dioxide; Nitrogen oxides; Engine load
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2011 journal article

Empirical Behavioral Models to Support Alternative Tools for the Analysis of Mixed-Priority Pedestrian-Vehicle Interaction in a Highway Capacity Context

Procedia - Social and Behavioral Sciences, 16, 653–663.

By: B. Schroeder & N. Rouphail*

author keywords: Pedestrians; Alternative Tools; Simulation; Highway Capacity; Unsignalized
TL;DR: Behavioral-based models for describing pedestrian gap acceptance at unsignalized crosswalks in a mixed-priority environment, where some drivers yield and some pedestrians cross in gaps are presented. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (OpenAlex)
Source: Crossref
Added: August 28, 2020

2011 journal article

Event-Based Modeling of Driver Yielding Behavior at Unsignalized Crosswalks

JOURNAL OF TRANSPORTATION ENGINEERING, 137(7), 455–465.

By: B. Schroeder n & N. Rouphail n

author keywords: Pedestrians; Logistic regression; Yielding; Crosswalks; Modeling; Microscopic
TL;DR: The analysis suggests that drivers are more likely to yield to assertive pedestrians who walk briskly in their approach to the crosswalk, and the yield probability is reduced with higher speeds, deceleration rates and if vehicles are traveling in platoons. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Turn pocket blockage and spillback models applications for signal timing and capacity analysis

Transportation Research Record, (2259), 112–122.

By: W. Reynolds, N. Rouphail & X. Zhou

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Estimating operational impacts of freeway work zones on extended facilities

Transportation Research Record, (2169), 70–80.

By: B. Schroeder & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Estimating sustained service rates at signalized intersections with short left-turn pockets mesoscopic approach

Transportation Research Record, (2173), 64–71.

By: W. Reynolds, X. Zhou, N. Rouphail & M. Li

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Identification and calibration of site-specific stochastic freeway breakdown and queue discharge

Transportation Research Record, (2188), 148–155.

By: A. Jia, B. Williams & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Mixed-priority pedestrian delay models at single-lane roundabouts

Transportation Research Record, (2182), 129–138.

By: B. Schroeder & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Simulation model for studying impact of vehicle-to-vehicle wireless communications on traffic network operations

Transportation Research Record, (2189), 107–115.

By: B. Mei, H. Hu, N. Rouphail & J. Lee

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Vehicle-Specific Emissions Modeling Based upon on-Road Measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 44(9), 3594–3600.

By: H. Frey n, K. Zhang n & N. Rouphail n

Contributors: H. Frey n

MeSH headings : Air Pollutants / analysis; Automobile Driving; Automobiles; Computer Simulation; Data Interpretation, Statistical; Environmental Monitoring / methods; Particulate Matter; Pressure; Regression Analysis; Transportation; Vehicle Emissions
TL;DR: Vehicle-specific microscale fuel use and emissions rate models are developed based upon real-world hot-stabilized tailpipe measurements made using a portable emissions measurement system and are sensitive to episodic events in driving cycles such as high acceleration. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

A Numerical Tool for Estimating Pollutant Emissions and Vehicles Performance in Traffic Interruptions on Urban Corridors

INTERNATIONAL JOURNAL OF SUSTAINABLE TRANSPORTATION, 3(4), 246–262.

By: M. Coelho*, T. Farias & N. Rouphail n

author keywords: numerical model; queue length; stop and go; traffic interruptions; vehicle emissions
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Assessing methods for comparing emissions from gasoline and diesel light-duty vehicles based on microscale measurements

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 14(2), 91–99.

By: M. Coelho*, H. Frey n, N. Rouphail n, H. Zhai* & L. Pelkmans*

Contributors: M. Coelho*

author keywords: Diesel vehicles; Emissions; On-board measurements; Vehicle specific power
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Comparison of Flexible Fuel Vehicle and Life-Cycle Fuel Consumption and Emissions of Selected Pollutants and Greenhouse Gases for Ethanol 85 Versus Gasoline

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 59(8), 912–924.

By: H. Zhai n, H. Frey n, N. Rouphail n, G. Goncalves & T. Farias

Contributors: H. Zhai n

MeSH headings : Air Pollutants / analysis; Bioelectric Energy Sources; Carbon Dioxide / analysis; Ethanol / chemistry; Gasoline / analysis; Models, Theoretical; Vehicle Emissions / analysis
TL;DR: Evaluated differences in fuel consumption and tailpipe emissions of flexible fuel vehicles (FFVs) operated on ethanol 85 (E85) versus gasoline imply that replacing gasoline with E85 reduces CO emissions, may moderately decrease NOx tail pipe emissions, and may increase HC tailpipe emission. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID
Added: August 6, 2018

2009 journal article

Modeling the role of transportation information in mitigating major capacity reductions in a regional network

Transportation Research Record, (2138), 75–84.

By: H. Hu, B. Williams, N. Rouphail, A. Khattak & X. Zhou

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Regional On-Road Vehicle Running Emissions Modeling and Evaluation for Conventional and Alternative Vehicle Technologies

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 43(21), 8449–8455.

By: H. Frey n, H. Zhai n & N. Rouphail n

Contributors: H. Frey n

MeSH headings : Environmental Restoration and Remediation / methods; Gasoline / analysis; Models, Chemical; Motor Vehicles; Time Factors; Vehicle Emissions / analysis
TL;DR: Emissions for all pollutants generally decreased with an increase in the market share of alternative vehicle technologies, and modest improvements in fuel economy may be offset by VMT growth and reductions in overall average speed. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2009 journal article

Working concept of accessibility performance measures for usability of crosswalks by pedestrians with vision impairments

Transportation Research Record, (2140), 103–110.

By: B. Schroeder, N. Rouphail & R. Hughes

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

A Vehicle-Specific Power Approach to Speed- and Facility-Specific Emissions Estimates for Diesel Transit Buses

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(21), 7985–7991.

By: H. Zhai n, H. Frey n & N. Rouphail n

Contributors: H. Zhai n

MeSH headings : Air Pollutants / analysis; Calibration; Carbon Dioxide / analysis; Confidence Intervals; Gasoline / analysis; Geographic Information Systems; Health Planning Guidelines; Models, Chemical; Motor Vehicles; Reproducibility of Results; Statistics, Nonparametric; Transportation / methods; Vehicle Emissions / analysis
TL;DR: This study estimates roadway link average emission rates for diesel-fueled transit buses based on link mean speeds, using newly defined VSP modes from data gathered by a portable emissions monitoring system. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 journal article

Analysis and modeling of automobile users' perceptions of quality of service on urban streets

Transportation Research Record, (2071), 26–34.

By: A. Flannery, N. Rouphail & D. Reinke

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Fuel use and emissions comparisons for alternative routes, time of day, road grade, and vehicles based on in-use measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 42(7), 2483–2489.

By: H. Frey n, K. Zhang n & N. Rouphail n

Contributors: H. Frey n

MeSH headings : Gasoline; Motor Vehicles
TL;DR: The results demonstrate that alternative routing can significantly impact trip emissions and vehicle-specific models are needed to capture episodic effects of emissions for near-road short-term human exposure assessment. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2008 conference paper

Impact of Alternative Vehicle Technologies on Measured Vehicle Emissions

Transportation Land Use, Planning, and Air Quality, 320.

By: H. Zhai n, H. Frey n, N. Rouphail*, G. Gonçalves & T. Farias

Contributors: H. Zhai n

Event: Transportation Land Use, Planning, and Air Quality Congress 2007

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Crossref, ORCID
Added: April 26, 2019

2008 journal article

Link-based emission factors for heavy-duty diesel trucks based an real-world data

Transportation Research Record, (2058), 23–32.

By: H. Frey, N. Rouphail & H. Zhai

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Multimodal level of service for urban streets

Transportation Research Record, (2071), 1–7.

By: R. Dowling, A. Flannery, B. Landis, T. Petritsch, N. Rouphail & P. Ryus

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Toward roundabout accessibility - Exploring the operational impact of pedestrian signalization options at modern roundabouts

Journal of Transportation Engineering, 134(6), 262–271.

By: B. Schroeder n, N. Rouphail n & R. Hughes n

TL;DR: The results suggest that the impact of pedestrian signals at roundabouts is greatest as vehicle volumes approach capacity, but that vehicle delay and queuing can be mitigated through innovative signal configurations. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Traveler information delivery mechanisms impact on consumer behavior

Transportation Research Record, (2069), 77–84.

By: A. Khattak, X. Pan, B. Williams, N. Rouphail & Y. Fan

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Comparing real-world fuel consumption for diesel- and hydrogen-fueled transit buses and implication for emissions

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 12(4), 281–291.

By: H. Frey n, N. Rouphail n, H. Zhai n, T. Farias & G. Goncalves

Contributors: H. Frey n

author keywords: fuel consumption; diesel buses; hydrogen fuel cells; vehicle specific power
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2007 journal article

Simulation and analysis of freeway lane reversal for coastal hurricane evacuation

Journal of Urban Planning and Development, 133(1), 61–72.

By: B. Williams n, A. Tagliaferri n, S. Meinhold n, J. Hummer n & N. Rouphail n

Sources: NC State University Libraries, ORCID, NC State University Libraries
Added: August 6, 2018

2006 journal article

Effect of roundabout operations on pollutant emissions

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 11(5), 333–343.

By: M. Coelho*, T. Farias & N. Rouphail n

author keywords: emissions; roundabout; speed profiles; stop and go; traffic
TL;DR: The main findings of the present work are: the characterization of three synthetic speed profiles that occur at a roundabout approach, the distribution of these profiles based on congestion levels, and the correlation between queue length and the number of stop and go cycles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2006 journal article

Evaluation of numerical models for simulation of real-world hot-stabilized fuel consumption and emissions of gasoline light-duty vehicles

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 11(5), 377–385.

By: C. Silva, T. Farias, H. Frey n & N. Rouphail n

Contributors: C. Silva

author keywords: instantaneous fuel consumption and emissions models; road gasoline vehicles; on-board measurements; traffic induced driving cycles
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2005 article

A methodology for modelling and measuring traffic and emission performance of speed control traffic signals

Coelho, M. C., Farias, T. L., & Rouphail, N. M. (2005, April). ATMOSPHERIC ENVIRONMENT, Vol. 39, pp. 2367–2376.

By: M. Coelho, T. Farias & N. Rouphail n

author keywords: modal emissions approach; numerical model; field measurements; speed violator; traffic delay; traffic calming; safety
TL;DR: An approach is presented here to explain the interaction between the signal control variables and environmental and traffic performance variables, in particular, carbon monoxide, nitric oxide and hydrocarbons emissions and delay, and it was concluded that the control of speed violators increases with traffic flow. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2005 chapter

Calibrating and validating deterministic traffic models: application to the HCM control delay at signalized intersections

In Geometric design and the effects on traffic operations, 2005 (pp. 95–105). Washington, DC: Transportation Research Board.

By: R. Paulo, J. Lin, N. Rouphail & J. Sacks

Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Exploratory simulation of pedestrian crossings at roundabouts

Journal of Transportation Engineering, 131(3), 211–218.

By: N. Rouphail n, R. Hughes n & K. Chae n

TL;DR: An analysis of pedestrian crossing treatments indicated that placing a pedestrian-actuated, signalized crossing upstream/ downstream of the roundabout results in delays to blind pedestrians that are comparable to those experienced by sighted pedestrians that cross at the unsignalized splitter island. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Impact of speed control traffic signals on pollutant emissions

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 10(4), 323–340.

By: M. Coelho, T. Farias & N. Rouphail n

author keywords: air pollution; field measurements; speed control traffic signals; speed violator
TL;DR: One of the main conclusions of the research is that signal control schemes that result in stopping a larger fraction of speed violators also yield higher emissions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2005 chapter

Lane utilization prediction models for lane-drop intersections

In Geometric design and the effects on traffic operations, 2005 (pp. 47–56). Washington, DC: Transportation Research Board.

By: J. Lee, N. Rouphail & J. Hummer

Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Making Trails

Public Roads, 69(1), 12–17.

By: A. Do, J. Hummer, J. Toole & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2005 article

Measuring and modeling emission effects for toll facilities

ENERGY AND ENVIRONMENTAL CONCERNS 2005, pp. 136–144.

By: M. Coelho*, T. Farias & N. Rouphail n

UN Sustainable Development Goal Categories
11. Sustainable Cities and Communities (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2005 chapter

Measuring and modeling emissions effects for toll facilities

In Transportation Research Record. Washington, DC: Transportation Research Board.

By: M. Coelho, T. Farias & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2005 chapter

User perceptions of the quality of service on shared paths

In Bicycles and pedestrians: Developing countries, 2005 (pp. 28–36). Washington, D.C.: Transportation Research Board.

By: J. Hummer, N. Rouphail, R. Hughes, S. Fain, J. Toole, R. Patten, R. Schneider, J. Monahan, A. Do

Source: NC State University Libraries
Added: August 6, 2018

2004 chapter

Assessing uncertainties in traffic simulation: A key component in model calibration and validation

In Calibration and validation of simulation models 2004 (pp. 32–40). Washington, DC: Transportation Research Board.

By: M. Bayarri, J. Berger, G. Molina, N. Rouphail & J. Sacks

Source: NC State University Libraries
Added: August 6, 2018

2004 chapter

Estimating link delays for arterial streets

In Urban and regional transportation modeling, essays in honor of David Boyce. Northhampton, MA: Edward Elgar.

By: E. Torres, P. Nelson, N. Rouphail & J. Raj

Source: NC State University Libraries
Added: August 6, 2018

2004 chapter

Method for priority-ranking and expanding freeway service patrols

In Freeway operations and traffic signal systems, 2004 (pp. 1–10). Washington, DC: Transportation Research Board, National Academy of Sciences.

By: A. Khattak, N. Rouphail, K. Monast & J. Havel

Source: NC State University Libraries
Added: August 6, 2018

2004 chapter

Methodology for prioritizing and expanding freeway service patrols

In Calibration and validation of simulation models 2004 (pp. 1–10). Washington, DC: Transportation Research Board.

By: A. Khattak, N. Rouphail, K. Monast & J. Havel

Source: NC State University Libraries
Added: August 6, 2018

2004 journal article

Quantification of highway vehicle emissions hot spots based upon on-board measurements

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 54(2), 130–140.

By: A. Unal n, H. Frey n & N. Rouphail n

MeSH headings : Air Pollutants / analysis; Data Collection; Environmental Monitoring / methods; Models, Theoretical; Vehicle Emissions / analysis
TL;DR: Average speed, average acceleration, standard deviation of speed, percent of time spent in cruise mode, minimum speed, maximum acceleration, and maximum power have statistically significant associations with vehicle emissions and influence emissions hot spots. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2004 chapter

Using arena for simulation of pedestrian crossing in roundabout areas

In Pedestrians and bicycles: Developing countries (pp. 58–65). Washington, DC: Transportation Research Board.

By: B. Wan & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2003 journal article

A statistically-based validation of computer simulation models in traffic operations and management

Journal of Transportation and Statistics, 5(1), 1–15.

Nagui Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2003 chapter

Comparison of capacity models for two-lane roundabouts

In Traffic flow theory and highway capacity, 2003 (pp. 114–123). Washington, DC: Transportation Research Board.

By: O. Hagring, N. Rouphail & H. Sorensen

Source: NC State University Libraries
Added: August 6, 2018

2003 chapter

Effect of arterial signalization and level of service on measured vehicle emissions

In Energy, air quality, and fuels 2003 (pp. 47–56). Washington, DC: Transportation Research Board.

By: A. Unal, N. Rouphail & H. Frey

Source: NC State University Libraries
Added: August 6, 2018

2003 chapter

Measured distributions of control delay on signalized arterials

In Traffic flow theory and highway capacity, 2003 (pp. 1–9). Washington, DC: Transportation Research Board.

By: J. Colyar & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2003 journal article

On-road measurement of vehicle tailpipe emissions using a portable instrument

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 53(8), 992–1002.

By: H. Frey n, A. Unal n, N. Rouphail n & J. Colyar n

MeSH headings : Air Pollutants / analysis; Automobiles; Environmental Monitoring / instrumentation; Public Policy; Reproducibility of Results; Sensitivity and Specificity; Transportation; Vehicle Emissions / analysis
TL;DR: Onboard data demonstrate the importance of accounting for the episodic nature of real-world emissions to help develop appropriate traffic and air quality management strategies. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2002 journal article

Field evaluation of lane selection strategies at signalized intersections

Journal of Transportation Engineering, 128(3), 224–231.

By: B. Nevers & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

2001 chapter

A saturation flow rate using traffic subgroups

In Traffic flow theory and highway capacity 2001 (pp. 114–122). Washington, D.C.: National Academy Press.

By: N. Rouphail & B. Nevers

Source: NC State University Libraries
Added: August 6, 2018

2001 chapter

Application of GPS to pupil transportation operations

In Transportation data and information technology Council, 2001. (pp. 242–249). Washington, DC: Transportation Research Board, National Research Council, 2001.

By: T. Rhoulac, N. Rouphail & J. Tsai

Source: NC State University Libraries
Added: August 6, 2018

2001 chapter

Assessment of stochastic signal optimization method using microsimulation

In Advanced traffic management systems and vehicle-highway automation 2001: Highway operations, capacity, and traffic control. Washington, D.C.: National Academy Press, 2001. (pp. 40–45). Washington, DC: National Academy Press.

By: B. Park, N. Rouphail & J. Sacks

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

Evaluating reliability of TRANSYT-7F optimization schemes

Journal of Transportation Engineering, 127(4), 319–326.

By: B. Park n, N. Rouphail n, J. Hochanadel n & J. Sacks n

TL;DR: It was found that while good correlation existed between the corresponding performance measures in TRANSYT-7F and CORSIM under light traffic, their correlation diminished under congested flow, and the best signal strategy identified in TRANSyT- 7F was not the best in the CORSim environment. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2001 chapter

Freeway systems research beyond Highway Capacity Manual 2000

In Traffic flow theory and highway capacity 2001 (pp. 1–9). Washington, DC: National Academy Press.

By: A. May, N. Rouphail, L. Bloomberg, F. Hall & T. Urbanik

Source: NC State University Libraries
Added: August 6, 2018

2001 journal article

Meta-optimization using cellular automata with application to the combined trip distribution and assignment system optimal problem

COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING, 16(6), 384–398.

By: W. ElDessouki*, Y. Fathi n & N. Rouphail n

TL;DR: A constrained system optimum combined trip distribution and assignment problem was selected and a mathematical formulation for the selected problem has been developed and a methodology for applying cellular automata has been presented. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2001 chapter

Saturation flow estimation by traffic subgroups

In Traffic flow theory and highway capacity 2001 (pp. 114–122). Washington, DC: National Academy Press.

By: N. Rouphail & B. Nevers

Source: NC State University Libraries
Added: August 6, 2018

2001 chapter

Using global positioning system to improve school bus routing and scheduling

In Transportation data and information technology (pp. 242–249). Washington, DC: Transportation Research Board.

By: T. Rhoulac, N. Rouphail & J. Tsai

Source: NC State University Libraries
Added: August 6, 2018

2000 chapter

Freeway facility methodology in Highway Capacity Manual 2000

In Traffic flow theory and highway capacity, 2000 (pp. 171–180). Washington, DC: National Academy Press.

By: B. Eads, N. Rouphail, A. May & F. Hall

Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

Probabilistic approach to implementing traffic signal warrants

Journal of Transportation Engineering, 332–343.

By: B. Park, N. Rouphail & J. Hummer

Source: NC State University Libraries
Added: August 6, 2018

2000 chapter

Validation results for four models of oversaturated freeway facilities

In Traffic flow theory and highway capacity, 2000 (pp. 161–170). Washington, DC: National Academy Press.

By: F. Hall, L. Bloomberg, N. Rouphail, B. Eads & A. May

Source: NC State University Libraries
Added: August 6, 2018

1999 chapter

Quality of service for interrupted flow facilities in highway capacity manual 2000

In Highway capacity, quality of service, and traffic flow and characteristics (pp. 25–31). Washington, D.C.: National Academy Press.

By: J. Milazzo, N. Rouphail, J. Hummer & P. Allen

Source: NC State University Libraries
Added: August 6, 2018

1998 conference paper

Capacity and level of service analysis of freeway systems

Proceedings, Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27, 1998, (1998 June).

By: L. Bloomberg, J. Clark, S. Cohen, B. Eads, F. Hall, A. May, A. Rathi, N. Rouphail, T. Urbanik

Source: NC State University Libraries
Added: August 6, 2018

1998 conference paper

Delay and queue length models for congested arterials

Proceedings, Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27, 1998, (1998 June).

By: N. Rouphail & D. Fambro

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Effect of bicycles on capacity of signalized intersections

In Highway capacity issues, 1998 (pp. 87–95). Washington, DC: Transportation Research Board.

By: D. Allen, J. Hummer, N. Rouphail & J. Milazzo

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Effect of pedestrians on capacity of signalized intersections

In Highway capacity issues, 1998 (pp. 37–46). Washington, DC: Transportation Research Board.

By: J. Milazzo, N. Rouphail, J. Hummer & D. Allen

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Literature synthesis: Pedestrians: Final report

In Highway capacity manual; Chapter 13: Pedestrians, final report submitted to the Highway Safety Research Center. Washington, DC: National Academy Press.

By: N. Rouphail & . al.

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Multiperiod highway improvement and construction scheduling: Model development and application

In Land use and transportation planning and programming applications (pp. 96–104). Washington, DC: Transportation Research Board.

By: W. Eldessouki, N. Rouphail, M. Beja & S. Ranjithan

Source: NC State University Libraries
Added: August 6, 2018

1998 conference paper

Pedestrian and bicycle impacts on signalized intersection operations: the U.S. experience

Proceedings of the Third International Symposium on Highway Capacity, Copenhagen, Denmark, June 22-27, 1998, 2(1998), 852–872.

By: N. Rouphail, J. Hummer & R. Goldblatt

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Recommended Procedures: Bicycles: Final report

In Highway capacity manual; Chapter 14: Bicycles, Final report submitted to the Highway Safety Research Center. Washington, DC: National Academy Press.

By: N. Rouphail & . al.

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Recommended Procedures: Pedestrians: Final report

In Highway capacity manual; Chapter 13: Pedestrians, final report submitted to the Highway Safety Research Center. Washington, DC: National Academy Press.

By: N. Rouphail & . al.

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

Research report and recommended procedures: Signalized intersections

In Highway capacity manual; Chapter 9: Signalized Intersections, Final report submitted to the Highway Safety Research Center. Washington, DC: National Academy Press.

By: N. Rouphail & . al.

Source: NC State University Libraries
Added: August 6, 2018

1998 chapter

The Effects of bicycles on the capacity of signalized intersections

In Highway capacity issues, 1998 (pp. 87–95). Washington, DC: National Academy Press.

By: P. Allen, J. Hummer, N. Rouphail & F. Milazzo

Source: NC State University Libraries
Added: August 6, 2018

1997 chapter

Bicycle operations and level of service literature synthesis

In Final Draft, Federal Highway Administration, McLean, VA, January 1997.

By: N. Rouphail, J. Hummer & D. Allen

Source: NC State University Libraries
Added: August 6, 2018

1997 chapter

Generalized delay model for signalized intersections and arterials

In Highway capacity issues and analysis (pp. 112–121). Washington, DC: National Academy Press.

By: D. Fambro & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

1997 book

ITS integration of real-time emissions data and traffic management systems

Transportation Research Board.

By: N. Rouphail & . al.

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Intelligent traffic data processing for ATIS applications

Journal of Transportation Engineering, 123(4), 298–307.

By: A. Tarko* & N. Rouphail n

TL;DR: The use of intelligent processing, or data integration tools, are proposed to overcome the data sparsity problem and make the best use of existing data resources and the elements of uncertainty and vagueness in defining and solving the problem. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

1997 chapter

Pedestrian impedance on turning movements saturation flow rates: A comparison of simulation, analytical and field observations

In Pedestrian and bicycle research 1997 (pp. 56–63). Washington, DC: National Academy Press.

By: N. Rouphail & B. Eads

Source: NC State University Libraries
Added: August 6, 2018

1997 conference paper

Proposed revisions to Highway Capacity Manual chapter 9: Pedestrian and bicycle analysis procedures

Proceedings of the ASCE Specialty Conference: Traffic Congestion and Safety in the 21st Century, Chicago, IL, June 8-11, 1997.

By: J. Milazzo, N. Rouphail, P. Allen & J. Hummer

Source: NC State University Libraries
Added: August 6, 2018

1997 journal article

Toward a class of link travel time functions for dynamic assignment models on signalized networks

TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 31(4), 277–290.

By: B. Ran*, N. Rouphail n, A. Tarko* & D. Boyce*

TL;DR: This paper investigates time-dependent travel time functions for dynamic assignment on signalized arterial network links and proposes six link flow variables and corresponding link state and flow propagation equations as the basis for dynamic transportation network models. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

1997 chapter

Validation of a generalized delay model for oversaturated conditions

In Highway capacity issues and analysis (pp. 122–130). Washington, DC: National Academy Press.

By: R. Engelbert, D. Fambro & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

1997 chapter

Validation of a generalized delay model for vehicle-actuated signals

In Highway capacity issues and analysis (pp. 105–111). Washington, DC: National Academy Press.

By: N. Rouphail, M. Anwar, D. Fambro, P. Sloup & C. Perez

Source: NC State University Libraries
Added: August 6, 2018

1988 chapter

Traffic control at freeway work sites

Civil Engineering Practice, N.J.: Technomic Publishing.

By: Z. Nemeth, A. Rathi & N. Rouphail

Source: NC State University Libraries
Added: August 6, 2018

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