Turner-Fairbank Highway Research Center

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NCHRP Report 524: Safety of U-Turns at Unsignalized Median Openings

Product Type

Research Report


Potts, I.B., D.W. Harwood, D.J. Torbic, K.R. Richard, J.S. Gluck, H.S. Levinson, P.M. Garvey, and R.S. Ghebrial




This report presents guidelines for locating and designing unsignalized median openings. A methodology is included for comparing the relative safety performance of different designs. Primarily, geometric designers for both state and local agencies will benefit from the report, but it will also be useful to those discussing the impacts of installing medians with business and property owners.

Link To Research Report

NCHRP Report 524: Safety of U-Turns at Unsignalized Median Openings


access control
arterial highways
highway design
left turns
median installation
median openings
multilane highways
rural areas
u turns
urban areas

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