Accident; analysis and prevention
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A study was conducted to evaluate mobile roadside speedometers as a means of controlling urban traffic speeds under varied schedules of deployment and speed limit law enforcement. Speeds of cars passing the roadside speedometer were measured using nondetectable radar. ⋯ However, the effect of the speedometer was limited to the times when it was actually deployed. Associated police enforcement is a key factor, as the effect of the speedometer decayed over time but could be long lasting with a minimal amount of enforcement activity in the area of the speedometer.