Is that Move Safe? Case Study of Cyclist Movements at Intersections with Cycling Discontinuities

Cyclist safety deals with methods to analyse safety and case studies to better understand the factors that lead to cyclist crashes. Surrogate measures of safety (SMoS) are being used as a proactive approach to identify severe interactions that do not result in an accident and interpreting them for a safety diagnosis. While most cyclist studies adopting SMoS have evaluated interactions by counting the total number of severe events per location, only a few have focused on the interactions between general directions of movement e.g. through cyclists and right turning vehicles. However, road users perform maneuvers that are more varied at a high spatiotemporal resolution such as a range of sharp to wide turning movements. These maneuvers (motion patterns) have not been considered in past studies as a basis for analysis to identify, among a range of possible motion patterns in each direction of travel, which ones are safer, and which are more likely to result in a crash.In this study, cyclist motion patterns are obtained from two cycling network discontinuity and two control sites in Montréal. A probabilistic SMoS method is adopted to obtain cyclist vehicle interactions and compute their time-to-collision (TTC). The Kruskal-Wallis and Kolmogorov–Smirnov tests are used to compare the TTC distribution between motion patterns in each site and between sites with and without a discontinuity. Results show that interactions are more severe and less safe, at both locations with a cycling network discontinuity and that cyclists following different movements have statistically different levels of safety.

  • Supplemental Notes:
    • This paper was sponsored by TRB committee ANF20 Standing Committee on Bicycle Transportation.
  • Corporate Authors:

    Transportation Research Board

    ,    
  • Authors:
    • Niaki, Matin S Nabavi
    • Saunier, Nicolas
    • Miranda-Moreno, Luis
  • Conference:
  • Date: 2019

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 20p

Subject/Index Terms

Filing Info

  • Accession Number: 01697846
  • Record Type: Publication
  • Report/Paper Numbers: 19-03202
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 1 2019 3:51PM