Reflectorized raised pavement markers (RRPMs) are high-impact plastic markers approximately 4 inches square and 3/4 inch high with one or two retroreflective faces. RRPMs are used to provide retroreflectivity, delineation, and guidance and to enhance the reflectivity of pavement markings.

RRPMs may serve as a positioning guide or a supplement to pavement markings. The TxDOT standard is to install RRPMs using position guidance on all roadways with centerlines. Position guidance placement is used to show the driver where the centerline or lane lines of the roadway are located. Supplemental markings are installed along the outside of the solid centerline. The spacing and location of the markings are intended to inform the driver if passing is allowed and also mark the lane line location. The spacing and location of the RRPMs can be seen on the PM and FPM �standard sheets.

The RRPMs should be maintained and replaced periodically to ensure that the driver is getting the expected benefits of the markers. Routine maintenance of the markers should be performed when fewer than two markers are visible when spaced at 80 feet or fewer than three markers are visible when spaced at 40 feet. Table 2-18 shows TxDOT’s suggested replacement cycle for RRPMs.

RRPMs should be applied to the roadway surface using either bitumen or epoxy adhesives. Bitumen adhesives are normally used on asphalt surfaces, and epoxy is normally used on concrete roadways. Any adhesives used must meet TxDOT DMS specifications for epoxy or bitumen and must be installed in accordance with the manufacturer’s recommendations.