Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways

United States. Federal Highway Administration. Office of Research, Development, and Technology

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Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways

[PDF-145.84 KB]

English

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Corporate Creators:

United States. Federal Highway Administration. Office of Research, Development, and Technology
Contributors:

Tan, Carol
Corporate Contributors:

Turner-Fairbank Highway Research Center
Subject/TRT Terms:

[+]

Freeways Highway Capacity Traffic Volume
Publication/ Report Number:

FHWA-HRT-05-001
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

United States. Federal Highway Administration. Office of Research, Development, and Technology
Abstract:

As traffic volumes grow on urban freeways, highway agencies face an ongoing challenge to maintain efficient traffic operations and acceptable levels of service. Increasing the capacity of a freeway by adding a lane can be difficult and expensive if it involves widening the existing roadbed, regrading roadside areas, and/or acquiring additional right-of-way. A number of highway agencies, however, have implemented projects in which a travel lane is added on an urban freeway by restriping the traveled way with narrower lanes, converting all or part of the shoulder to a travel lane, or a combination of both. The traffic operational benefits of such conversions are immediate and obvious, but the safety effects are uncertain. This study addresses these safety effects.
Format:

PDF
Alternate URL:

https://www.fhwa.dot.gov/publications/research/safety/05001/05001.pdf ; https://www.fhwa.dot.gov/publications/research/safety/05001/ ;
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:90704b2ccccba93ff87a0fb864cf2a2fc9dda146569c59ac5310997f0e6ff825
Download URL:

https://rosap.ntl.bts.gov/view/dot/40568/dot_40568_DS1.pdf
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Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways

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