Evaluation of Bus-Bicycle and Bus/Right-Turn Traffic Delays and Conflicts

This research evaluates conflicts and delays caused by interactions between buses, bicycles, and right-turning vehicles. Two concerns caused by these overlapping bus, bicycle, and automobile facilities are analyzed; the first concern is the number of bus-bicycle conflicts (as a proxy for safety) and the second concern is bus delay. Video data was collected and analyzed to quantify conflicts, travel time, and delay. For every bus passing through the study site, the mixed-traffic scenario that the bus incurs was categorized as one of 72 different combinations of bus, bicycle, and automobile interactions. Video count data was weighted according to seasonal, weekly, and hourly bicycle volume data to estimate the number of annual bus-bicycle conflicts. A regression analysis was performed to identify potential sources of delays. The results indicate that each bicycle crossing the intersection after the bus (within 60 feet of the bus) contributes to bus delay. No statistically significant delay was found from the bicycles stopped in the bicycle box, bicycles stopped behind the bicycle box, bicycles that crossed the intersection before the bus, or the presence of right-turning vehicles.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 39p

Subject/Index Terms

Filing Info

  • Accession Number: 01722072
  • Record Type: Publication
  • Report/Paper Numbers: NITC-RR-1186
  • Created Date: Nov 5 2019 4:28PM