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This is a fascinating display of how humans react to increased information while driving. I've noticed that I also react to the knowledge of how long the light will stay on with counters but never really thought about how it could cause accidents.
http://www.npr.org/2014/07/01/327199161/safety-feature-for-pedestrians-has-undesired-consequence
http://www.npr.org/2014/07/01/327199161/safety-feature-for-pedestrians-has-undesired-consequence
SHANKAR VEDANTAM, BYLINE: Well, the danger is that pedestrians are not the only ones who can see this countdown timer. Drivers can see the timer too and as the timer starts winding down to two or three seconds the driver knows the traffic light is about to turn red and that makes some of them speed up to get through the intersection.