Can Time Proximity Measures Be Used as Safety Indicators in All Driving Cultures? Case Study of Motorcycle Safety in China

Limitations associated with traditional collision-based safety analysis techniques led to a growing interest in the use of surrogate safety measures such as the traffic conflict technique. This interest was facilitated by advances in automated video-based data collection methods that helped to overcome the reliability issues associated with manual collection of data on traffic conflicts. Various objective conflict indicators that measure various spatial and temporal aspects of user proximity are available to measure the severity of traffic events. These time-proximity conflict measures assume that proximity is a surrogate for conflict severity. However, this assumption may not be valid in many driving environments. The objective of this paper is to investigate whether time-proximity conflict measures can be a good indicator of safety in less-organized traffic environments with highly mixed road users. A case study of motorcycle conflicts in a highly congested shared intersection in Shanghai, China, was used as a case study. Traffic conflicts were analyzed with the use of automated video-based analysis techniques. Several traffic conflict indicators designed to detect evasive actions, such as deceleration, jerk, and yaw rate, were recommended as better able to measure traffic conflicts in such traffic environments. The results showed that indicators that measured evasive actions had higher potential to identify motorcycle conflicts in highly mixed, less-organized traffic environments than did time-proximity measures such as the time to collision.

• Record URL:
  • https://doi.org/10.3141/2520-19
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309369589
• Authors:
  • Tageldin, Ahmed
  • Sayed, Tarek
  • Wang, Xuesong
• Publication Date: 2015

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 165–174
• Monograph Title: Bicycles and Motorcycles
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2520
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Case studies; Data collection; Motorcycles; Traffic conflicts; Traffic safety
• Uncontrolled Terms: Evasive maneuvers; Time to collision
• Geographic Terms: China; Shanghai (China)
• Subject Areas: Highways; Pedestrians and Bicyclists; Planning and Forecasting; Safety and Human Factors; Vehicles and Equipment; I80: Accident Studies; I90: Vehicles;

Filing Info

• Accession Number: 01555222
• Record Type: Publication
• ISBN: 9780309369589
• Report/Paper Numbers: 15-4371
• Files: PRP, TRIS, TRB, ATRI
• Created Date: Feb 26 2015 10:03AM