Chris Frey

Challenges and opportunities for research supporting cumulative impact assessments at the United States environmental protection agency's office of research and development

Lancet Regional Health - Americas, 30.

Contribution of Cold Starts to Real-World Trip Emissions for Light-Duty Gasoline Vehicles

ATMOSPHERE, 14(1).

Identifying emissions hotspots and strategies to reduce real-world fuel use and emissions for passenger rail: A spatially resolved approach

SCIENCE OF THE TOTAL ENVIRONMENT, 896.

Redefining exposure science to advance research supporting cumulative impacts, environmental justice, and decision-making

Journal of Exposure Science and Environmental Epidemiology, 33(6), 843–845.

Simple Diesel Train Fuel Consumption Model for Real-Time Train Applications

ENERGIES, 16(8).

Fuel use and emission rates reduction potential for light-duty gasoline vehicle eco-driving

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 109.

Intermodal comparison of tailpipe emission rates between transit buses and private vehicles for on-road passenger transport

ATMOSPHERIC ENVIRONMENT, 281.

Microenvironment Tracker (MicroTrac) model to estimate time-location of individuals for air pollution exposure assessments: model evaluation using smartphone data

Breen, M. S. S., Xu, Y., Frey, H. C., Breen, M., & Isakov, V. (2022, December 16). JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, Vol. 12.

Characterizing Fuel Use and Emission Hotspots for a Diesel-Operated Passenger Rail Service

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 55(15), 10633–10644.

Combined effects of increased O-3 and reduced NO2 concentrations on short-term air pollution health risks in Hong Kong

ENVIRONMENTAL POLLUTION, 270.

Factors affecting variability in gaseous and particle microenvironmental air pollutant concentrations in Hong Kong primary and secondary schools

INDOOR AIR, 31(1), 170–187.

Factors affecting variability in infiltration of ambient particle and gaseous pollutants into home at urban environment

BUILDING AND ENVIRONMENT, 206.

Multi-scale evaluation of diesel commuter rail fuel use, emissions, and eco-driving

TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 99.

Real-world activity, fuel use, and emissions of heavy-duty compressed natural gas refuse trucks

SCIENCE OF THE TOTAL ENVIRONMENT, 761.

Sensitivity of light duty vehicle tailpipe emission rates from simplified portable emission measurement systems to variation in engine volumetric efficiency

Wei, T., & Frey, H. C. (2021, June 10). JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, Vol. 6.

Evaluation of the Precision and Accuracy of Cycle-Average Light Duty Gasoline Vehicles Tailpipe Emission Rates Predicted by Modal Models

TRANSPORTATION RESEARCH RECORD, 2674(7), 566–584.

Factors affecting variability in fossil-fueled transit bus emission rates

ATMOSPHERIC ENVIRONMENT, 233.

Geospatial Variation of Real-World Tailpipe Emission Rates for Light-Duty Gasoline Vehicles

Environmental Science & Technology, 54(14), 8968–8979.

PRAISE -HK: A personalized real-time air quality informatics system for citizen participation in exposure and health risk management

SUSTAINABLE CITIES AND SOCIETY, 54.

Potential for metro rail energy savings and emissions reduction via eco-driving

APPLIED ENERGY, 268.

Quantification of Sources of Variability of Air Pollutant Exposure Concentrations Among Selected Transportation Microenvironments

TRANSPORTATION RESEARCH RECORD, 2674(9), 395–411.

The need for a tighter particulate-matter air-quality standard

New England Journal of Medicine, 383(7), 680–683.

Variability in Measured Real-World Operational Energy Use and Emission Rates of a Plug-In Hybrid Electric Vehicle

Energies.

Air Pollution at College Football Games: Developing a Methodology for Measuring Air Pollutant Exposure in a Sport Event Microenvironment

Event Management, 23(3), 399–412.

Comparison of real-world vehicle fuel use and tailpipe emissions for gasoline-ethanol fuel blends

FUEL, 249, 352–364.

Effect of Air-Conditioning on Light Duty Gasoline Vehicles Fuel Economy

TRANSPORTATION RESEARCH RECORD, 2673(5), 131–141.

Indoor Exposure to Ambient Particles and Its Estimation Using Fixed Site Monitors

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 53(2), 808–819.

Quantification of Energy Saving Potential for A Passenger Train Based on Inter-Run Variability in Speed Trajectories

TRANSPORTATION RESEARCH RECORD, 2673(5), 153–165.

A review of factors impacting exposure to PM2.5, ultrafine particles and black carbon in Asian transport microenvironments

Atmospheric Environment, 187, 301–316.

Comparison of real-world and certification emission rates for light duty gasoline vehicles

SCIENCE OF THE TOTAL ENVIRONMENT, 622, 790–800.

Dynamics of coarse and fine particle exposure in transport microenvironments

NPJ CLIMATE AND ATMOSPHERIC SCIENCE, 1(1).

Effect of Light Duty Vehicle Performance on a Driving Style Metric

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

Factors affecting variability in PM 2.5 exposure concentrations in a metro system

Environmental Research, 160, 20–26.

Real-world fuel use and gaseous emission rates for flex fuel vehicles operated on E85 versus gasoline

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(3), 235–254.

Trends in on-road transportation, energy, and emissions

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(10), 1015–1024.

Trends in onroad transportation energy and emissions

[Review of ]. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 68(6), 514–563.

Characterization of PM2.5 exposure concentration in transport microenvironments using portable monitors

ENVIRONMENTAL POLLUTION, 228, 433–442.

Real-World Freeway and Ramp Activity and Emissions for Light-Duty Gasoline Vehicles

TRANSPORTATION RESEARCH RECORD, 2627(2627), 17–25.

Comparison of Vehicle-Specific Fuel Use and Emissions Models Based on Externally and Internally Observable Activity Data

TRANSPORTATION RESEARCH RECORD, 2570(2570), 30–38.

Dose-Response Models are Conditional on Determination of Causality

Frey, H. C. (2016, September). RISK ANALYSIS, Vol. 36, pp. 1751–1754.

Effect of Biodiesel Fuels on Real-World Emissions of Passenger Locomotives

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(21), 12030–12039.

Evaluation of Light-Duty Gasoline Vehicle Rated Fuel Economy Based on In-Use Measurements

TRANSPORTATION RESEARCH RECORD, 2570(2570), 21–29.

Highway Vehicle Emissions Avoided by Diesel Passenger Rail Service Based on Real-World Data

Urban Rail Transit, 2(3-4), 153–171.

Real-world activity, fuel use, and emissions of diesel side-loader refuse trucks

ATMOSPHERIC ENVIRONMENT, 129, 98–104.

Sequential Measurement of Intermodal Variability in Public Transportation PM2.5 and CO Exposure Concentrations

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 50(16), 8760–8769.

Comparison of Over-the-Rail and Rail Yard Measurements of Diesel Locomotives

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(21), 13031–13039.

Comparison of Sources of Variability in School Age Children Exposure to Ambient PM2.5

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(3), 1511–1520.

In-use activity, fuel use, and emissions of heavy-duty diesel roll-off refuse trucks

JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 65(3), 306–323.

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.

Measurement and Evaluation of Real-World Speed and Acceleration Activity Envelopes for Light-Duty Vehicles

TRANSPORTATION RESEARCH RECORD, 2503(2503), 128–136.

Simplified method for comparing emissions in roundabouts and at signalized intersections

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

Variability in Light-Duty Gasoline Vehicle Emission Factors from Trip-Based Real-World Measurements

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 49(20), 12525–12534.

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

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

Assessment of the Effect of Population and Diary Sampling Methods on Estimation of School-Age Children Exposure to Fine Particles

RISK ANALYSIS, 34(12), 2066–2079.

Comparison of Fine Particulate Matter and Carbon Monoxide Exposure Concentrations for Selected Transportation Modes

TRANSPORTATION RESEARCH RECORD, (2428), 54–62.

In-use measurement of the activity, fuel use, and emissions of front-loader refuse trucks

ATMOSPHERIC ENVIRONMENT, 92, 557–565.

Method for Modeling Driving Cycles, Fuel Use, and Emissions for Over Snow Vehicles

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 48(14), 8258–8265.

Road grade quantification based on global positioning system data obtained from real-world vehicle fuel use and emissions measurements

ATMOSPHERIC ENVIRONMENT, 85, 179–186.

Comparing exposure metrics for the effects of fine particulate matter on emergency hospital admissions

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 23(6), 627–636.

Comparison of Locomotive Emissions Measured During Dynamometer Versus Rail Yard Engine Load Tests

TRANSPORTATION RESEARCH RECORD, (2341), 23–33.

Effects of errors on vehicle emission rates from portable emissions measurement systems

Transportation Research Record, (2340), 10–19.

Emissions estimation at multilane roundabouts

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

Engine and Duty Cycle Variability in Diesel Construction Equipment Emissions

JOURNAL OF ENVIRONMENTAL ENGINEERING, 139(2), 261–268.

Method for Measuring the Ratio of In-Vehicle to Near-Vehicle Exposure Concentrations of Airborne Fine Particles

TRANSPORTATION RESEARCH RECORD, (2341), 34–42.

Road Grade Measurement Using In-Vehicle, Stand-Alone GPS with Barometric Altimeter

JOURNAL OF TRANSPORTATION ENGINEERING-ASCE, 139(6), 605–611.

Assessment of Inter-Individual, Geographic, and Seasonal Variability in Estimated Human Exposure to Fine Particles

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 46(22), 12519–12526.

Effects of Engine Idling on National Ambient Air Quality Standards Criteria Pollutant Emissions from Nonroad Diesel Construction Equipment

TRANSPORTATION RESEARCH RECORD, (2270), 67–75.

Evaluation of On-Site Fuel Use and Emissions over the Duration of a Commercial Building Project

JOURNAL OF INFRASTRUCTURE SYSTEMS, 18(2), 119–129.

Evaluation of representativeness of site-specific fuel-based vehicle emission factors for route average emissions

Environmental Science and Technology, 46(12), 6867–6873.

Methodology for Estimating Emissions Inventories for Commercial Building Projects

Journal of Architectural Engineering, 18(3), 251–260.

Modeling of Human Exposure to In-Vehicle PM2.5 from Environmental Tobacco Smoke

HUMAN AND ECOLOGICAL RISK ASSESSMENT, 18(3), 608–626.

Portable Emission Measurement System for Emissions of Passenger Rail Locomotives

TRANSPORTATION RESEARCH RECORD, (2289), 56–63.

Real-world measurement and evaluation of duty cycles, fuels, and emission control technologies of heavy-duty trucks

Transportation Research Record, (2270), 180–187.

Techno-economic analysis of combined cycle systems

In Combined Cycle Systems for Near-Zero Emission Power Generation (pp. 306–328).

Time series analysis of personal exposure to ambient air pollution and mortality using an exposure simulator

JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY, 22(5), 483–488.

Assessing Effects of Operational Efficiency on Pollutant Emissions of Nonroad Diesel Construction Equipment

TRANSPORTATION RESEARCH RECORD, (2233), 11–18.

Assessment of Interindividual and Geographic Variability in Human Exposure to Fine Particulate Matter in Environmental Tobacco Smoke

Risk Analysis, 31(4), 578–591.

Development of a modal emissions model for a hybrid electric vehicle

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