@article{ref1,
title="Waterborne Traffic Paint Performance in Utah Based on Retroreflectivity",
journal="Transportation research circular",
year="2006",
author="Liu, V",
volume="",
number="E-C098",
pages="217-231",
abstract="The Utah Department of Transportation (UDOT) performed a study to collect pavement marking retroreflectivity data that will provide a better understanding of the impact on waterborne traffic paint of exposure to traffic and other road activities. In 2002, UDOT upgraded its waterborne traffic paint specification to adopt the newest durable waterborne paint technology. In the same year, UDOT began a 3-year study to determine when roads of low, medium, and high average annual daily traffic (AADT) should be repainted based on the retroreflectivity values of the new paint. The failure criterion for the paint is a retroreflectivity value of 100 millicandelas per square meter per lux (mcd/m²/lx), which is a commonly used value in practice. Several state routes were selected for collecting retroreflectivity data throughout the duration of the study. A mobile retroreflectometer was used to collect retroreflectivity readings periodically from the time of initial roadway painting until the time of assumed paint failure. The results of the study established a better understanding of pavement marking deterioration and provided a guideline on waterborne traffic paint failure projection for the department. Combined study year 1 and 2 data revealed that paint retroreflectivity failure occurs between 8 to 17 months after painting, depending on the AADT of the road. This improvement is a result of the change in paint formulation and application. The study also illustrates some other factors that could affect the life of paint, for example, winter activities. As this study progresses, further data collection will be performed, and UDOT will use the results to improve its current pavement marking practices.<p />",
language="",
issn="0097-8515",
doi="",
url="http://dx.doi.org/"
}