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FHWA Highway Safety Programs

Archived Hardware Eligibility Letters – NCHRP 350

These letters are archived and are posted for "historical and research purposes only" per the sunset dates in the AASHTO/FHWA Joint Implementation Agreement and exceptions to these dates as posted on the AASHTO Committee on Design website.

Letter Date Testing Manufacturer Hardware Type Device Description
CC-123T NCHRP 350 EASI Barrier Terminals and Crash Cushions TREND 350, TANGENT
B-224 NCHRP 350 Massachusetts / Texas Longitudinal Barriers and Bridge Rails TL-2 Texas T-401 Bridge Rail
CC-122 NCHRP 350 EASI Barrier Terminals and Crash Cushions TL-3 TREND Median Terminal
WZ-297 NCHRP 350 Eastern Metal Work Zone Devices X-500 Aluminum Stand
WZ-303 NCHRP 350 Eastern Metal/USA-Sign Work Zone Devices C-202 and C-902 sign stands with coil springs
WZ-310 NCHRP 350 TrafFix Devices Work Zone Devices Quad Drop Sign Stand
SS-174 NCHRP 350 Trinity Highway Products Sign Supports, Mailboxes, and Delineator Posts Breakaway Sign Support Systems of Northwest Pipe Company
WZ-305 NCHRP 350 Plasticade Products Work Zone Devices Econocade Type I & II Barricade
WZ-309 NCHRP 350 Bone Safety Signs Work Zone Devices Portable Sign Stand using Tires
B-153A NCHRP 350 Atlanticum Bridge Longitudinal Barriers and Bridge Rails TL-2 NatureRail Aesthetic Barrier