A recent traffic study in Philadelphia revealed that longer yellow lights and intersection cameras are effective in keeping drivers from running red traffic lights.
According to Insurance Institute for Highway Safety (IIHS), who conducted the study, both approaches reduced traffic signal violations. However, the red light cameras made a more significant difference after the extended-yellow-light initiative was put in place.
The extension of yellow lights reduced signal violations by 36 percent, and red-light camera enforcement reduced violations by an astounding 96 percent.
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