United States Department of Transportation
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Examining Instrumented Roadways for Speed- Related Problems [Traffic Tech]
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2023-06-01
[PDF-152.74 KB]
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Edition:Traffic Tech
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Abstract:This edition of Traffic Tech briefly describes a larger report about a project evaluated efforts by the Stafford County, Virginia, Sheriff’s Office to reduce speeding on roadways. Speed and enforcement data looked at impacts of the enforcement efforts. From this, the SCSO was able to make decisions on where countermeasures would be applied and what countermeasures would be implemented, including deputy presence with on-site enforcement, decoy cars, speed trailers with digital feedback signs, and changeable message signs. Decoy cars proved to be the most successful activity that led to drivers reducing their speeds for more than a day, likely influenced by length of deployment time at a given location. Speed trailers and deputies on-site issuing citations were also effective, but seemed to be localized. The study found the number of speeders to be a statistically significant predictor of crashes and showed that traffic volumes can increase without a concurrent increase in crashes if the increased volume is made up of non-speeders.
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