Safety Effects of the Yellow Light Border (YPB) Pedestrian Signal

The conflict between pedestrians using crosswalk and turning traffic at intersections poses a safety risk to pedestrians. To mitigate the risk, Caltrans engineers conceived a new safety feature for pedestrian signal – Yellow Pedestrian Border (YPB). YPB is a new feature that a yellow LED light border is added around the pedestrian signal (See Picture 1). YPB is a supplement to the existing standard pedestrian signal display, which provides a direct feedback to pedestrians who push the crosswalk button. Furthermore, YPB also makes the pedestrian signal more visible, which alerts drivers that the pedestrian signal is about to serve a crosswalk. A preliminary study conducted in Redding, CA, demonstrated the benefits of YPB and its impact on pedestrian safety. This research is an extension to the preliminary study, which aims at testing and assessing the YPB safety benefits at different locations and traffic conditions. This study was carried out following a previous study by in Redding, California, with a goal to evaluate the anticipated benefit of the yellow pedestrian border signal in a more diverse setting with five different locations around California. The study aims to determine whether the additional feature to the traditional pedestrian signal provides an overall benefit to both vehicular traffic and pedestrians, resulting in improved interactions between vehicles and pedestrians at intersection. The improvement is measured and evaluated by comparing different type of conflicts, violations, and extra-push events for before and after YPB installations.

• Record URL:
  https://dot.ca.gov/-/media/dot-media/programs/research-innovation-system-information/documents/final-reports/ca19-3078-finalreport-a11y.pdf
• Record URL:
  https://merritt.cdlib.org/api/presign-file/ark%253A%252F13030%252Fm5gf6639/1/producer%252Fca19-3078-finalreport-a11y.pdf
• 
• Corporate Authors:

  University of California, Davis

  Davis, CA  United States 

  California Department of Transportation

  Division of Research and Innovation and System Information
  P.O. Box 942873, MS 83
  Sacramento, CA  United States  94273-0001
• Authors:
  • Musabbir, Sarder Rafee
  • Chen, Shenyang
  • Zhang, Michael
• Publication Date: 2019-1-31

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 64p

Subject/Index Terms

• TRT Terms: Behavior; Crosswalks; Pedestrian actuated controllers; Pedestrian vehicle interface; Pedestrians; Signal lights; Traffic safety
• Geographic Terms: Redding (California)
• Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors;

Filing Info

• Accession Number: 01752904
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Report/Paper Numbers: CA19-3078
• Contract Numbers: 65A0627
• Files: CALTRANS, BTRIS, TRIS, ATRI, STATEDOT
• Created Date: Sep 24 2020 6:27PM