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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
B-72 NCHRP 350 New York State DOT Longitudinal Barriers and Bridge Rails 2-, 4-, and 5-Rail Bridge Railing Designs @ TL-4
CC-68 NCHRP 350 MwRSF-U of NB Barrier Terminals and Crash Cushions Trie-beam Bullnose attenuator @ TL-3
B-64A NCHRP 350 Pennsylvania DOT Longitudinal Barriers and Bridge Rails Modified Weak-Post W-beam guardrail @TL-3
WZ-59 NCHRP 350 Eastern Metal Work Zone Devices E-350 EconoStand, Z-552 Wind Defl. Interst. Stand, MELBA Type III Barr., X-602 Stand, X-842 Stand
SS-72A NCHRP 350 TAPCO Sign Supports, Mailboxes, and Delineator Posts V-Loc Sign Support
WZ-58 NCHRP 350 Buildem Barricades Work Zone Devices Generic Type II barricades 24 inches wide. See WZ-54
WZ-57 NCHRP 350 Korman Signs Work Zone Devices SS-548V portable sign stand.
WZ-50 NCHRP 350 Dicke Tool Work Zone Devices Portable sign stands.
WZ-56 NCHRP 350 Eastern Metal Work Zone Devices Various portable sign stands and a barricade.
WZ-52 NCHRP 350 Reflexite Work Zone Devices Endurance Rigid Plastic Signs on Certain Portable Sign Stands