Speed Impacts from Roundabouts and Other Traffic Control Devices

Summary:

Roadway geometry and intersection traffic control are typically some of the best tools that roadway design engineers actually have to influence vehicular speed. Roundabouts have shown to be exceptional at lowering operating speed and providing traffic calming to various roadways. However, the exact impacts and expected operating speeds of vehicles entering and exiting roundabouts and various intersections is not well known with specific speed information. This study would build on prior work and seek to understand the speed which drivers use to enter and exit roundabouts, signals, and other various traffic control types.

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