NCHRP 05-21 Safety and Performance Criteria for Retroreflective Pavement Markers

Project status

In progress

Start date: 09/01/15
End date: 12/01/17


Principal investigator:

Co-principal investigators:

About the research

The objective of this research is to develop a guide for transportation practitioners that describes and evaluates the safety benefits, as shown by driver performance or other methods, of retroreflective pavement markers (RPMs), both raised and recessed, for nighttime driving, particularly during wet weather.

See the NCHRP project page here:


Sponsor(s): National Cooperative Highway Research Program (NCHRP)