Safety effects of using narrow lanes and shoulder-use lanes to increase the capacity of urban freeways : summary report.

Author(s)
Bauer, K.M. Harwood, D.W. Richard, K.R. & Hughes, W.E.
Year
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. The final report, "Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways," appears in the Transportation Research Board's Transportation Research Record: Journal of the Transportation Research Board No. 1897, 2004. (Author/Publisher)

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Publication

Library number
C 33646 [electronic version only]
Source

McLean, VA, U.S. Department of Transportation DOT, Federal Highway Administration FHWA, Turner-Fairbank Highway Research Center Research and Development RD, 2005, 6 p., 5 ref.; Highway Safety Information System HSIS Summary Report ; FHWA-HRT-05-001

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This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.