United States Department of Transportation
i
The effects of in-vehicle and infrastructure-based collision warnings at signalized intersections
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2009-12-01
[PDF-912.79 KB]
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NTL Classification:NTL-SAFETY AND SECURITY-Accidents;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;
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Abstract:The potential effectiveness of warnings to drivers of the imminent threat of a collision with a red light violator was evaluated in an experiment that used a driving simulator. Three warnings were tested: (1) an infrastructure-based warning that immediately turned the traffic signal red and activated red wig-wag lights, (2) an in-vehicle warning that consisted of a brake pulse, voice annunciation, and activation of a red dashboard light, and (3) simultaneous activation of both of these warnings. In addition to testing three warnings with different groups of drivers, drivers in each group were exposed to one of three traffic conditions: (1) driving with no other vehicles ahead or behind, (2) following closely to another vehicle, or (3) being closely followed by another vehicle.
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