Lesson
Variable advisory speed limit (VASL) systems encourage drivers to slow down gradually as they approach rural work zones.
An investigation of work zone traffic control in Missouri
08/01/2013
I-270,St. Louis,Missouri,United States
Background (Show)
Lesson Learned
The following recommendations were based on the case studies investigated.
- Use VASL systems to lower speeds and achieve better compliance with posted speed limits in areas without congestion in urban work zones.
- Use VASL systems to complement static speed limit signs in areas without congestion in rural work zones. This can lead to safer traffic conditions by encouraging drivers to slow down gradually as they approach work areas.
- Use simulation modeling to optimize VASL system algorithms. A well designed VASL algorithm, like the 5-minute (P5) algorithm developed in this study can improve mobility and safety in congested work zones.
States
Countries
Keywords
smart work zone systems, VSL, smart work zone, smart work zones, Smart work zones, workzone, WZ
Lesson ID: 2014-00678
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