SafeTREC Publication in Transportation Research Part A: Policy and Practice

June 29, 2018

Congratulations to Julia BG et al. for publishing a new paper, A behavioral modeling approach to bicycle level of service, in Transportation Research Part A: Policy and Practice. The abstract is provided below. Read the full paper here.


Bicycle level of service (LOS) measures are essential tools for transportation agencies to monitor and prioritize improvements to infrastructure for cyclists. While it is apparent that different types of cyclists have varying preferences for the facilities on which they ride, in current research and practice, measures are used that are either insufficiently quantitative and empirical or lack cyclist segmentation. In this study, we conducted a detailed survey on cyclist habits, preferences, and user experience, capturing responses to videos of a bicycle traveling on road segments in the San Francisco Bay Area. The survey provided rich behavioral data, which invited both quantitative and qualitative exploration. We compared facility preferences from the survey to scores from two common measures, NCHRP bicycle level of service (NCHRP BLOS), and level of traffic stress (LTS); and we examined the responses to open-ended questions to gain insights about heterogeneity of preferences among cyclists. Finally, we applied behavioral analysis tools as a proof of concept for a new bicycle level of service measure that accounts for the segmentation of cyclist types via a latent class choice model. Combining statistics and behavioral analysis, we can improve the quality of bicycle level of service measures to make decisions driven by empirically measured cyclist preferences.


  • Bicycles
  • Level of service
  • Performance measures
  • Behavioral modeling

Julia B. Griswold, Mengqiao Yu, Victoria Filingeri, Offer Grembek, Joan L. Walker, A behavioral modeling approach to bicycle level of service, Transportation Research Part A: Policy and Practice, Volume 116, October 2018, Pages 166-177, ISSN 0965-8564, ( Keywords: Bicycles; Level of service; Performance measures; Behavioral modeling

Funding for this project was provided by a grant from the California Office of Traffic Safety (OTS) through the National Highway Traffic Safety Administration (NHTSA).