All: Safety

Displaying 808 result(s).

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.
Date Posted: 11/13/2003 | Source Date:
Automated speed and red-light enforcement reduced the percentage of vehicles exceeding the speed limit by 58 percent, the number of persons killed or seriously injured by 4 to 65 percent, and the personal injury accident rate by 6 percent.
Date Posted: 07/25/2003 | Source Date:
In Nebraska, a portable speed detection and warning system placed upstream from an I-80 work zone decreased the highest 15 percent of vehicle speeds by about 5 mi/hr as vehicles approached the work zone lane merge area.
Date Posted: 05/28/2003 | Source Date:
A 1995 North American survey of traffic management centers using ramp metering, identified reductions of 15 to 50 percent in freeway crashes.
Date Posted: 01/01/2003 | Source Date:
In Glasgow, Scotland a freeway ramp metering system installed at an entrance ramp to the M8 motorway reduced the frequency of early merging by 29 percent.
Date Posted: 01/01/2003 | Source Date:
In a rural area of Virginia, a collision countermeasure system installed on a two-way stop-controlled intersection reduced vehicle speeds by 2.4 mi/hr, and increased the average projected time to collision from 2.5 to 3.5 seconds.
Date Posted: 01/01/2003 | Source Date:
Automated red light enforcement at 11 intersections in Oxnard, California reduced crashes by 7 percent, decreased right-angle crashes by 32 percent, lowered injury crashes by 29 percent, and reduced right-angle injury crashes by 68 percent.
Date Posted: 01/01/2003 | Source Date:
In Iowa, a CB radio alert system designed to warn truckers of slow moving maintenance vehicles on freeways effectively warned 39 of 59 truckers interviewed that remembered seeing the maintenance work in-progress.
Date Posted: 01/01/2003 | Source Date:
In Greenwood, Nebraska a portable traffic management system designed to caution drivers of work zone activity and encourage use of alternative routes during periods of congestion increased traffic diversion by 4 percent.
Date Posted: 01/01/2003 | Source Date:
In Germany, a simulation study found that with 50 percent of vehicles equipped, the braking control features of a collision avoidance system would contribute to a 45 to 60 percent decrease in collisions when the leading vehicle brakes.
Date Posted: 12/19/2002 | Source Date:
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