Evaluation of Lane Reduction

Turner-Fairbank Highway Research Center

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Evaluation of Lane Reduction "Road Diet" Measures and their Effects on Crashes and Injuries

2004-12-01
By Turner-Fairbank Highway Research Center

[PDF-213.99 KB]

English

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Details:

Corporate Creators:

Turner-Fairbank Highway Research Center
Corporate Contributors:

United States. Federal Highway Administration. Office of Research, Development, and Technology
Subject/TRT Terms:

[+]

Accident Frequencies Accident Rates Accident Severity Accident Types Before And After Studies Design Four Lane Highways Highway Design Highways I82: Accidents And Transport Infrastructure Road Diets Safety And Human Factors Three Lane Highways
Publication/ Report Number:

FHWA-HRT-04-082
Resource Type:

Tech Report
Geographical Coverage:

United States;Washington;California
TRIS Online Accession Number:

00974914
Edition:

Final Report
Corporate Publisher:

Turner-Fairbank Highway Research Center ; United States. Federal Highway Administration

Turner-Fairbank Highway Research Center ; United States. Federal Highway Administration Less -
Abstract:

Road diets are often conversions of four-lane undivided roads into three lanes (two through lanes and a center turn lane). The fourth lane may be converted to bicycle lanes, sidewalks, and/or on-street parking. In other words, existing space is reallocated; the overall area remains the same. This study evaluated road diets at several locations in California and Washington. Key findings of this study are: 1) Crash frequencies at road diets in the after period were approximately 6% lower than at the corresponding comparison sites; 2) Crash rates did not change significantly from the before period to the after period; 3) Road diet conversions did not affect crash severity; and 4) Road diet conversions did not result in a significant change in crash types.
Format:

PDF
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:040119c97f5497e913a707bce475a23ff4c8c3a591a507733a50042c8b9a92d8
Download URL:

https://rosap.ntl.bts.gov/view/dot/35853/dot_35853_DS1.pdf
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No Additional Files

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Evaluation of Lane Reduction "Road Diet" Measures and their Effects on Crashes and Injuries

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