Turner-Fairbank Highway Research Center

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NCHRP Report 518: Safety Evaluation of Permanent Raised Pavement Markers

Product Type

Research Report


Bahar, G., C. Mollett, B. Persaud, C. Lyon, A. Smiley, T. Smahel, and H. McGee




This report presents the findings of a research project to evaluate the safety performance of snowplowable permanent raised pavement markers (PRPMs) on two-lane roadways and four-lane freeways. An analytical engineering procedure relying on safety performance functions or crash prediction models for roadways with and without PRPMs was developed to determine the potential cost-effectiveness of implementing PRPMs at a location. The report will be of particular interest to traffic engineers with responsibility for installing and maintaining pavement marking systems.

Link To Research Report

NCHRP Report 518: Safety Evaluation of Permanent Raised Pavement Markers


permanent raised pavement markers
inclement weather
low visibility
safety performance
crash prediction models

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