Variable speed limit (VSL) systems have been used in a number of countries, particularly in Europe, as a method to improve flow and increase safety. VSLs use detectors to collect data on current traffic and/or weather conditions. Posted speed limits are then dynamically updated to reflect the conditions that motorists are actually experiencing. Presenting drivers with speed limits that are appropriate for current conditions may reduce speed variance, a concept sometimes called speed harmonization. If properly designed, VSL systems have been shown to reduce crash occurrence and can also reduce system travel time through increased uniformity in traffic speeds. High-volume urban work zones tend to be prone to congestion and safety problems, and VSLs may be one way to ameliorate these issues.
Work Zone Variable Speed Limit Systems: Effectiveness and System Design Issues
2010
47 pages
Report
No indication
English
Road Transportation , Transportation Safety , Transportation & Traffic Planning , Transportation , Highway Engineering , Work zones , Speed limit , Law enforcement , Changeable message signs , Traffic control devices , Warning systems , Traffic safety , Accident reduction , Construction site traffic control , Traffic congestion , Urban areas , Evaluation , Variable speed limit (VSL) , Speed harmonization
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