The National Academies

NCHRP Synthesis 20-05/Topic 29-05 [Final (Synthesis)]

Impact of Narrow Median Widths on Commercial Vehicles
[ NCHRP 20-05 (Synthesis of Information Related to Highway Practices) ]

  Project Data
Funds: 20000
Staff Responsibility: Donna L. Vlasak
Effective Date: 12/1/1998
Completion Date: 4/10/2000
Fiscal Year: 1997

This synthesis report will be of interest to officials and staff of municipal, regional, and statewide transportation agencies responsible for roadway design and traffic control. It will be of special interest to those concerned with intersections and driveways on divided highways where larger vehicles encounter narrow medians. It will also be of interest to other professionals who interact with these agencies to mitigate such problems. This report presents state-of-the-practice information about current median design policies and practices, describes the traffic operational and safety problems encountered in designing for larger vehicles at divided highway intersections, and identifies alternative improvement techniques that can be used in new construction or reconstruction projects to avoid introducing traffic operational and safety problems. This TRB report focuses on 10 alternative cross sections widely used on arterial highways in urban, suburban, and rural environments.  The report for this topic can be purchased at http://www.trb.org/news/blurb_detail.asp?id=3278

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