District of Columbia (11 unique benefit summaries found)

In Washington DC an ITS work zone program implemented on I-295 decreased delay up to 90 percent with an average decrease in delay of 52 percent when drivers were advised to take alternate routes.(October 2008)

The Washington, D.C. region Metrorail service required that SmarTrip cards be used to pay for parking at all Metrorail stations increasing the purchase of cards from 8,000 per month to 75,000 per month during the first two months.(25 March 2005)

In the Washington DC metropolitan area, drivers who use route-specific travel time information instead of wide-area traffic advisories can improve on-time performance by 5 to 13 percent.(9-13 January 2005)

A simulation study in the Washington, DC area found that regular users of pre trip traveler information reduced their frequency early and late arrivals by 56 and 52 percent, respectively.(12-16 January 2003)

A simulation study in the Washington, DC area found that 40 percent of travelers who use pre-trip traveler information would save $60.00 or more per year as a result of fewer early and late arrivals.(12-16 January 2003)

A simulation study found that drivers using traveler information arrived at their destination within 15 minutes of the target arrival time 79 percent of the time; this percentage drops to 42 without traveler information.(14-18 October 2002)

Evaluation Results of Three Prototype Automatic Truck Rollover Warning Systems(11-15 January 1998)

In Colorado, a dynamic truck downhill speed warning system (DSWS) installed on I-70 decreased the number of accidents by 13 percent.(15 December 1997)

After a ramp rollover warning system was installed at three curved exit ramps on the beltway around Washington, DC, there were no accidents at any of these sites during the three year post deployment test period evaluated.(15 December 1997)

In Colorado, a down hill truck speed warning system installed on I-70 reduced runaway ramp usage by 24 percent and contributed to a 13 percent drop in crashes involving trucks and excessive speeds.(May 1997)

A preliminary analyses of the potential impacts of an automated highway system on the Long Island Expressway and I-495 Capital Beltway was projected to improve capacity and reduce travel time by 38 to 48 percent.(October 1995)