Retroreflectometers

Article March 16, 2004
One of the most important means of providing safe guidance to motorists on our nation’s highways is through traffic markings. All department of transportation (DOT) agencies in the U.S. and Canada use longitudinal pavement markings for center lines, lane lines and edge lines to communicate...
Article February 17, 2004
By now the tools exist to effectively quantify the influence of weather, wear and chemicals on road surface quality and to model how often those surfaces need maintenance or replacement. Less familiar to highway engineers are the tools used to measure and model the lifetime of the retroreflective...
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