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FHWA Home / Safety / Proven Safety Countermeasures / Road Diets (Roadway Reconfiguration) / Proven Safety Countermeasures - Road Diets - (Roadway Reconfiguration)

Proven Safety Countermeasures

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For more information about this Proven Safety Countermeasure, visit the Office of Safety's Road Diet website.

Road Diets
(Roadway Reconfiguration)

FHWA treskelion logo.
U.S. Department of Transportation
Federal Highway Administration

FHWA-SA-17-066

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.


For more information on this and other FHWA Proven Safety Countermeasures, please visit
https://safety.fhwa.dot.gov/provencountermeasures.

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Office of Safety logo: Safe Roads for a Safer Future
Page last modified on October 18, 2017
Safe Roads for a Safer Future - Investment in roadway safety saves lives
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