Vehicle time headways and spacings were measured at a point along a highway, from a single-lane rural roadway, over the course of an hour. The average values were calculated as 2.5 seconds per vehicles for headway and 200 feet per vehicle for spacing. What is the density, in vehicle per mile?

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Highway Safety

Proper highway safety refers to the methods or rules that prevent highway travelers from being killed or severely injured. Proper highway safety measures help to protect motorists, cyclists, pedestrians, passengers on public transport, and so on.