NCHRP Report 350 Compliance Tests of the ADIEM (TTI-1995-5)

ADIEM, the soft concrete end terminal and crash cushion, is in use in twenty states. The 9.1 m (30-ft) design, which is qualified by FHWA under NCHRP Report 230 for collisions up to 96.5 km/h (60 mph), has been subjected to a broad scope of environmental conditions and many different types of collisions during use across the United States over the past four (4) years.|This report presents additional testing necessary to qualify the ADIEM for NCHRP Report 350 Recommended Procedures for the Safety Performance Evaluation of Highway Features, Test Level 3 performance.|Tests conducted previously under NCHRP Report 230 and under the current test program show the acceptable performance of the ADIEM when impacted by errant vehicles. Smooth redirections and controlled stopping of the vehicles has been achieved under the various test configurations. All evaluation criteria outlined in NCHRP Report 350 for the tests conducted have been met.