How many signalized intersections are there in the U.S.?
No one can say for sure, because no one collects comprehensive data on this. A 2004 Institute of Transportation Engineers (ITE) project, “Signal Timing Practices and Procedures: State of the Practice”, included a survey of a large number of jurisdictions of all sizes, to estimate the total number of signalized intersections in the U.S. That report concluded that a very accurate “rule of thumb” is one signalized intersection per 1,000 population. That would mean that, as the U.S. has an estimated 2009 population of 307 million, we’ve got over 300,000 signals in the U.S.
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