Study Admits Yellow Times Too Short at Intersections

Transportation officials recommend adding 0.5 seconds of yellow time in new report.

A report by state transportation officials released last week tacitly admitted drivers are being shortchanged when the light at an intersection turns yellow. The National Cooperative Highway Research Program (NCHRP) released its guidelines on how municipalities can best time their signals for safety. The net result is that most intersections would see yellows extended by roughly half-a-second if the recommendations were adopted.

Signal timing has become a highly political issue due to lobbying by the National Motorists Association and the 2001 release of a report on the issue by the US House Majority Leader (view report). Various changes to the signal timing formula and other techniques have been used so that yellows are roughly one second shorter in the current Institute of Transportation Engineers (ITE) formula compared to what the prior formula used in 1976 generated. The states of Ohio and Georgia responded in the past three years by enacting laws mandating an extra second of yellow, resulting in a documented reduction in red light running. The NCHRP report admits the benefit of longer yellows.

"Increasing the yellow change interval to the duration calculated by current ITE guidelines has been shown to reduce red-light running occurrences between 36 and 50 percent," the report explained.

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Anonymous

Posted: Nov 22 2012, 5:53 AM

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9885

The thing i can't seem to get over is why everyone has to speed up to get to that red light ahead? Talk about moron shit, why waste gas speeding up to a red light, when all you are going to do is waste your gas and brakes? I can only count a handful of people each day that don't actually speed up to red lights...I'll tell you something, if you slowed down a bit before the light while it is red, then you might no have to waste gas taking off from a complete stop, by coasting a bit before getting to the intersection instead of hauling ass to wait at a red light.. Just sounds logical to me, but amazed at how many have yet to figure this one out! One more thing, why don't we have SMART intersection now , since they have cameras that watch every intersection now, we should have smart lights at every intersection so that we don't have to waste so much gas sitting at light where there are no cars crossing ,but people are still sitting waiting for a light for 5 minutes. especially in big cities like Miami and such! Petition for SMart intersection lights to save gas and time and make this world a little more efficient!

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