@article{jackson_o'brien_searcy_warchol_2017, title={Quality Assurance and Quality Control Processes for a Large-Scale Bicycle and Pedestrian Volume Data Program}, volume={2644}, ISSN={["2169-4052"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85016201044&partnerID=MN8TOARS}, DOI={10.3141/2644-03}, abstractNote={ Phase 1 of North Carolina’s Non-Motorized Volume Data Program (NMVDP) was conducted in the North Carolina Department of Transportation Divisions 7 and 9 in the Triad–Piedmont region of North Carolina. Continuous count stations (CCSs) were installed to monitor bicyclist and pedestrian traffic at 12 locations and began collecting data in late 2014. These stations covered a mix of sites across different land uses, travel patterns, and volume groups. Sites performed automated detection of pedestrians on sidewalks, bicycles and pedestrians on shared-use paths, bicycles in bicycle lanes, bicycles on sidewalks, and bicycles in mixed traffic. This paper summarizes the programmatic elements developed and implemented to select, install, and ensure high data quality for the 12 CCSs. These elements include agency coordination, site selection, equipment procurement and setup, equipment validation, equipment maintenance, data handling, quality assurance and quality control checks, and data reporting and analysis. After piloting this program in one region, the research team identified several changes to test when the NMVDP was expanded to a new region of the state to improve the quality of data collected: conduct weekly inspections of the data and perform validation to promptly identify maintenance issues, investigate the development of hourly data checks to implement, use a simpler interquartile range check, and consider developing automation to check data. }, number={2644}, journal={TRANSPORTATION RESEARCH RECORD}, publisher={SAGE Publications}, author={Jackson, Kristy N. and O'Brien, Sarah Worth and Searcy, Sarah E. and Warchol, Shannon E.}, year={2017}, pages={19–29} }
 @article{cook_sarah w. o'brien_jackson_findley_searcy_2016, title={Behavioral Effects of Completing a Critical Link in the American Tobacco Trail}, volume={2598}, ISSN={["2169-4052"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84976295627&partnerID=MN8TOARS}, DOI={10.3141/2598-03}, abstractNote={ This study responded to a unique opportunity to determine behavioral changes that resulted from the construction of a critical link of the American Tobacco Trail (ATT) in Durham, North Carolina. Observational data were collected both before and after construction of a bicycle-and-pedestrian bridge that linked two separate segments of the regional greenway. Before construction of the bridge and trail connections, the two segments of the ATT were separated by Interstate 40. Heavy traffic on local streets as well as a lack of bicycle and pedestrian facilities in the area provided additional barriers to active travel between the two ATT segments. The Institute of Transportation Research and Education conducted intercept surveys and manual counts on the two trail segments before and after construction of the bridge. The before-and-after data were compared to determine the changes that occurred in the use of the ATT and the accompanying social, public health, transportation, and economic effects. }, number={2598}, journal={TRANSPORTATION RESEARCH RECORD}, publisher={SAGE Publications}, author={Cook, Thomas J. and Sarah W. O'Brien and Jackson, Kristy N. and Findley, Daniel J. and Searcy, Sarah E.}, year={2016}, pages={19–26} }
 @article{holzem_hummer_cunningham_o'brien_schroeder_salamati_2015, title={Pedestrian and bicyclist accommodations and crossings on superstreets}, number={2486}, journal={Transportation Research Record}, author={Holzem, A. M. and Hummer, J. E. and Cunningham, C. M. and O'Brien, S. W. and Schroeder, B. J. and Salamati, K.}, year={2015}, pages={37–44} }
 @article{o'brien_jackson_vosburgh_findley_2015, title={Rumble Strip Gaps for High-Speed Bicycles}, volume={2520}, ISSN={["2169-4052"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84976509792&partnerID=MN8TOARS}, DOI={10.3141/2520-05}, abstractNote={ Shoulder rumble strips (SRSs) are a proven safety countermeasure that reduces motor vehicle lane departures; however, they may be seen as an impediment to bicycle travel because they decrease comfort for bicyclists and can affect riders' control while bicycling. Existing literature provides recommendations for the placement of regular gaps in SRSs, but the supporting research is limited to low and moderate bicycle speeds. Roads with SRSs along long, steep grades present a unique set of risks for cyclists because of the possibility of higher bicycle speeds. This study evaluated how variations in SRS gap lengths and shoulder widths affected bicyclists' ability to maneuver through these gaps when riding at higher than average speeds. The findings suggest that as gap length increases, bicyclists may increase downhill speed while reporting fewer instances of discomfort when attempting to cross larger gaps. The likelihood of a bicyclist hitting a simulated rumble strip while crossing a gap decreases modestly as the gap size increases. Shoulder widths in excess of 4 ft do not appear to significantly influence bicyclists' capability of maneuvering across different gap lengths and had only a minor effect on bicyclists' speeds. }, number={2520}, journal={TRANSPORTATION RESEARCH RECORD}, author={O'Brien, Sarah Worth and Jackson, Kristy N. and Vosburgh, Erik and Findley, Daniel}, year={2015}, pages={32–40} }
 @article{o'brien_simpson_2012, title={Use of "your speed" changeable message signs in school zones experience from North Carolina safe routes to school program}, number={2318}, journal={Transportation Research Record}, author={O'Brien, S. W. and Simpson, C. L.}, year={2012}, pages={128–136} }
 @article{meletiou_lawrie_cook_o'brien_guenther_2005, title={Economic impact of investments in bicycle facilities: Case study of North Carolina's northern Outer Banks}, ISBN={0309094135}, number={1939}, journal={Bicycles and pedestrians: Developing countries, 2005}, publisher={Washington, D.C.: Transportation Research Board}, author={Meletiou, M. P. and Lawrie, J. J. and Cook, T. J. and O'Brien, S. W. and Guenther, J.}, year={2005}, pages={15–21} }