U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
| TECHBRIEF |
| This fact sheet is an archived publication and may contain dated technical, contact, and link information |
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| Publication Number: FHWA-HRT-19-034 Date: July 2019 |
Publication Number: FHWA-HRT-19-034 Date: July 2019 |
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Throughput at signalized intersections with high left-turn demand is a common cause of bottleneck for traffic flow. Dynamic lane-grouping strategies offer cost-effective methods for increasing operational efficiency within existing rights of way. Previous traffic simulations suggest that reversible leftturn lanes can significantly increase throughput at intersections where left-turn demand is high.(2,3) However, the operational benefits offered by reversible-turn-lane designs depend on safe and proper use by drivers.
