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FHWA Home / Safety / Proven Safety Countermeasures / Proven Safety Countermeasures

Proven Safety Countermeasures | Pedestrian/Bicycles

16. Road Diets
(Roadway Reconfiguration)

Icon representing road reconfiguration.

Road Diets
(Roadway Reconfiguration)

A "Road Diet," or roadway reconfiguration, can improve safety, calm traffic, provide better mobility and access for all road users, and enhance overall quality of life.

SAFETY BENEFIT:

4-Lane → 3-Lane
Road Diet Conversions
19-47%

Reduction in total crashes

Source: Evaluation of Lane Reduction "Road Diet" Measures on Crashes, FHWA-HRT-10-053.

Before and after photos of a Road Diet project.
Source: City of Orlando, Florida

A Road Diet typically involves converting an existing four-lane undivided roadway to a three-lane roadway consisting of two through lanes and a center two-way left-turn lane (TWLTL).

Road Diet project in Honolulu, Hawaii.
Source: Leidos

Benefits of Road Diet installations may include:

A Road Diet can be a low-cost safety solution when planned in conjunction with a simple pavement overlay, and the reconfiguration can be accomplished at no additional cost.

Office of Safety logo: Safe Roads for a Safer Future

https://safety.fhwa.dot.gov/provencountermeasures.

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Page last modified on November 2, 2018
Safe Roads for a Safer Future - Investment in roadway safety saves lives
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000