Investigating Cyclist–Pedestrian Interactions at Bus Stops and Non-signalized Intersections Using a Distance–Velocity Model and Speed Measures Derived from Video Data

As walking and cycling flows increase in urban areas, cyclist-pedestrian interactions also increase at road facilities such as crosswalks at non-signalized intersections and bus stops located along segregated cycle tracks. Cyclist yielding proportions at these locations can be low which could deteriorate pedestrian safety and comfort. To investigate pedestrian safety at these locations, this study introduces a framework using cyclists’ distance, speed and yielding maneuver information at the time of pedestrian occurrence and crossing derived from video data. The distance-to-crosswalk and speed of the cyclist are used to classify the cyclist’s situation at pedestrian occurrences into three categories: i) where the cyclist cannot make a full stop; ii) where the ability to yield depends on the reaction time; and iii) where the cyclist can stop to yield. Yielding behavior and crossing decision are classified. Pedestrian safety is validated using direct measures such as yielding compliance rates, and indirect measures such as time-to-crossing and the deceleration rate required to stop. Cyclist crossing speeds at the crosswalk are also analyzed. A case study involving several crosswalk locations on cycle tracks from Montreal, Canada, was conducted. Video data was collected and video-based tracking techniques were used to extract cyclist speed and distance information. Results allow for microscopic analysis and provide insight into cyclist pedestrian interactions. The factors that contribute to the low yielding compliance of cyclists and the impact of marking, and road grade on cyclist behavior are explored. This safety analysis could inform policy on bicycle yielding enforcement and bicycle braking system standards.

• Supplemental Notes:
  • This paper was sponsored by TRB committee ANB00 Section - Safety.nn Alternate title: Investigating Cyclist–Pedestrian Interactions at Bus Stops and Nonsignalized Intersections Using a Distance–Velocity Model and Speed Measures Derived from Video Data
• Authors:
  • Fu, Ting
  • Beitel, David
  • Ledezma-Navarro, Bismarck
  • Saunier, Nicolas
  • Miranda-Moreno, Luis
• Conference:
  • Transportation Research Board 97th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2018-1-7 to 2018-1-11
• Date: 2018

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 18p

Subject/Index Terms

• TRT Terms: Bicycle facilities; Bus stops; Case studies; Distance; Highway grades; Mathematical models; Pedestrian movement; Pedestrian safety; Pedestrian vehicle interface; Unsignalized intersections; Velocity; Video; Yielding
• Geographic Terms: Montreal (Canada)
• Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Planning and Forecasting; Safety and Human Factors;

Filing Info

• Accession Number: 01657522
• Record Type: Publication
• Report/Paper Numbers: 18-05083
• Files: TRIS, TRB, ATRI
• Created Date: Jan 24 2018 9:25AM