Physics

The stoplights on a street are designed to keep traffic moving at 34 mi/h. The average length of a street block between traffic lights is about 80 m.
What must be the time delay between green lights on successive blocks to keep the traffic moving continuously? There are 1.609 × 103 m in a mile.

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1. See previous post: Thu, 8-20-15, 4:47 PM.

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