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Quick correction - 15% faster was overall, it was 50% faster for ambulances.

Point still stands. In the U.S. our ambulances are equipped with remotes to trigger light changes to improve speed. The roads are also much wider, with bigger shoulders that are less dense, etc. This is a very dubious claim, to be able to achieve 50% faster response times in the U.S., an ambulance would have to on average travel twice as fast, which is not necessarily even safe or desirable from present speeds traveled.

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