Dr. Paul Carlson, head of TTI Operations and Roadway Safety Division, speaks about a new ASTM International standard for Measuring the Coefficient of Retroreflected Luminance of Pavement Markings in a Standard Condition of Continuous Wetting. (Read more)
Road Angels-Traffic Technology International Article on pavement markings
March 21, 2011 -
Cast aside any aspersions you may have about the humble pavement marking. As Nick Bradley finds, these life-savers are worth every cent, while developments on the horizon are set to advance safety levels to a much higher plane. (Read more)
Raised question: TTI tests the durability of pavement markers
March 10, 2011 -
The worst of driving conditions calls for the best of roadway markers. With their reflective properties, retroreflective raised pavement markers (RRPMs) have guided many nervous drivers safely to their destination on rainy nights.
The durability and performance of RRPMs are critically important to departments of transportation nationwide. A few years ago, the Texas Department of Transportation (TxDOT) noticed an increased number of RRPM failures resulting from poor retention on pavements, physical damage and loss of retroreflectivity. In some cases, mass failures occurred when an entire section of RRPMs disappeared only weeks after installation. Read more
