Roadway Operations & Maintenance > Work Zone Management > Variable Speed Limits

>> System Costs Documents

The Michigan DOT leased seven variable speed limit trailers for six months at a cost of approximately $400,900.(December 2002)

>> Benefits Documents

A variable speed limit system deployed at a work zone on I-96 in Lansing, Michigan contributed to a decrease in the number of high-speed vehicles in the work zone.(September 2003)

A variable speed limit system deployed at a work zone on I-96 in Lansing, Michigan contributed to a decrease in travel times and an increase in average speeds.(September 2003)

On the Køge Bugt Motorway in Copenhagen, Denmark, variable speed limits reduced vehicle speeds by up to 5 km/h and contributed to smoother traffic flow during peak periods.(8 April 2003)

A survey of motorists in Copenhagen, Denmark, found that 80 percent of respondents were satisfied with variable speed limits and the traveler information posted on dynamic message signs.(8 April 2003)