This report presents a set of recommended test methods for evaluating durability of detectable warning systems. These methods address exposure regimes, test procedures, and evaluation criteria to help select detectable warning systems that provide long-term performance and durability while meeting the requirements of the Americans with Disabilities Act Accessibility Guidelines (ADAAG). The test methods are presented in AASHTO format to facilitate consideration and incorporation into the AASHTO Standard Specifications for Transportation Materials and Methods of Sampling and Testing. The material contained in the report should be of immediate interest to state materials engineers and those concerned with the different aspects of the ADAAG. The appendix contained in the research agency’s final report provides further elaboration on the work performed in this project. This appendix titled Research Leading to the Development of Methodology for Durability Assessment of Detectable Warning Systems is available online at http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_rpt_670Appendix.pdf (Author/publisher)
Samenvatting