I-80 Hybrid Regulatory Speed Signing Design and VSL System Evaluation [Research Brief]

Details

• Alternative Title:
  Impact of Regulatory Hybrid Changeable Message Sign on Traffic Safety under Different Freeway Geometric Designs Project Title from Cover
• Creators:
  Yang, Xianfeng ; Azin, Bahar
• Corporate Creators:
  University of Utah. Department of Civil and Environmental Engineering ; Mountain-Plains Consortium
• Corporate Contributors:
  Utah. Department of Transportation ; United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
• Subject/TRT Terms:
  • Highway safety
  • Machine learning
  • Variable message signs
  • Variable speed limits
  • Visibility
  • Weather conditions
• Publication/ Report Number:
  MPC 22-488 (project 610)
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Edition:
  Research Brief
• Corporate Publisher:
  Mountain-Plains Consortium
• Abstract:
  Changeable message signs are designed to have a white legend on a black background based on the Manual on Uniform Traffic Control Devices. However, signs with white legends during winter seasons are less visible in snowstorms and direct sunlight due to the specific road’s landscape. Under these conditions, the Utah Department of Transportation transforms variable speed limit (VSL) signs to have amber lettering on a black background. There was a need to document the effectiveness of this strategy.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/68301/dot_68301_DS1.pdf
• File Type:
  [PDF - 626.21 KB]
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha256:64bb0447fabd0e3d379f7510da0db39f16997d48c717f705e822613f139d1a0a