Next generation safety performance monitoring at signalized intersections using connected vehicle technology.

Details

• Creators:
  Zha, Liteng ; Songchitruksa, Praprut ; Balke, Kevin N.
• Corporate Creators:
  Texas A&M Transportation Institute ; Southwest Region University Transportation Center (U.S.)
• Corporate Contributors:
  United States. Dept. of Transportation. Research and Innovative Technology Administration ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Signalized intersections
  • Wireless communication systems
  • Traffic safety
  • Sensitivity analysis
  • Performance measurement
  • Vehicle to roadside communications
  • Mobile communication systems
  • Driver information systems
  • Traffic simulation
• Publication/ Report Number:
  SWUTC/14/161303-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Texas
• Corporate Publisher:
  Texas A&M Transportation Institute
• Abstract:
  Crash-based safety evaluation is often hampered by randomness, lack of timeliness, and rarity of crash ; occurrences. This is particularly the case for technology-driven safety improvement projects that are ; frequently updated or replaced by newer ones before it is possible to gather adequate crash data for a ; reliable and defensible before-after evaluation. Surrogate safety data are commonly used as an alternative ; to crash data; however, its current practice is still resource intensive and subject to human errors. The ; advent of connected vehicle technology allows vehicles to communicate with each other and infrastructure ; wirelessly. This platform also offers the opportunity for automated and continuous tracking of vehicle ; trajectories and signal status at the facilities in real time. These types of data can potentially be extracted ; and used to detect the deficiencies in the safety performance of the facility operation. ; This project examines the viability of long-term monitoring of connected vehicle data for safety ; performance evaluation. As limited saturation of onboard equipment (OBE) is expected in the near-term ; evolution, the study focuses on a connected vehicle application that can process data elements from OBEs ; via vehicle-to-infrastructure communications using standard message sets. To accomplish the objective, a ; signalized intersection test bed was created in VISSIM while the wireless communications capability and ; the application were implemented using Car-to-Everything Application Programming Interface. The ; evaluation results indicated that the application can effectively detect changes in safety performance at full ; market penetration. Sensitivity analysis showed that at least 40 percent penetration rate is desirable for ; reliable safety deficiency detection under light to moderate traffic volume conditions. The observation ; period can be extended to compensate for low sample size under low OBE market penetrations. The ; required observation periods vary with the types of safety indicators being collected and the levels of OBE ; saturation
  More +
• Format:
  PDF
• Funding:
  10727
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28212/dot_28212_DS1.pdf
• File Type:
  [PDF - 996.31 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:787c3ddb18978895cdc32834b29d49c171140f3248c406d0f43cc9a33bfce105