During the first year of this project the emphasis was on determining the wet-night visibility of various pavement marking systems under a variety of realistic rainfall levels. The researchers performed a literature review. They analyzed 20 years of Texas rainfall data to determine the most appropriate rainfall levels to use as design criteria for a rain tunnel. Using a low, medium, and high rainfall rate (0.28, 0.52, and 0.87 inches per hour, respectively), a 1600 ft long rain tunnel was designed and built at Texas A&M University's Riverside Campus.
For More InformationPaul Carlson
Operations and Design Division
Texas A&M Transportation Institute
Texas A&M University System
College Station, TX 77843-3135
ph. (979) 847-9272 · fax (979) 845-6006