Speed-activated dynamic message signs with warning messages reduced vehicle speeds by 8 to 9 mi/hr; sustained effects for long-term work zones. Radar equipped DMS can be used to display specific warning messages to drivers if vehicle speeds are detected above preset threshold levels. This strategy was implemented for several weeks at three… Content type Benefit Date Posted 02/02/2007 Taxonomy (ARC-IT) Speed Warning and Enforcement (TM17), Work Zone Management (MC06), Traffic Incident Management System (TM08), Reduced Speed Zone Warning / Lane Closure (VS09) Geolocation links Bristol, Virginia, United States