USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation
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
SS-123# NCHRP 350 Designovations Sign Supports, Mailboxes, and Delineator Posts Snap N Safe coupling for square sign supports
SS-142 NCHRP 350 Dent Breakaway Industries Sign Supports, Mailboxes, and Delineator Posts Omni directional slip base accommodates round and square posts for dual post supports
WZ-249 NCHRP 350 Bone Safety Signs Work Zone Devices 3mm and 4mm Bone Light aluminum laminate sign substrate
CC-95 NCHRP 350 TrafFix Devices, Inc Barrier Terminals and Crash Cushions The Compressor is a redirective, non-gating Crash Cushion
WZ-242 NCHRP 350 Bone Safety Signs Work Zone Devices X-Footprint Sign Stand
WZ-248 NCHRP 350 Eastern Metal /USA Sign Work Zone Devices X-Footprint sign stand
WZ-243 NCHRP 350 Impact Recovery Systems, Inc. Work Zone Devices Tuff Curb
WZ-177#2 NCHRP 350 Protection Services Work Zone Devices Vertical Panel
SS-145 NCHRP 350 SteelCity Partners Sign Supports, Mailboxes, and Delineator Posts Fundaflex sign support
B-154 NCHRP 350 Perini Corporation Longitudinal Barriers and Bridge Rails ESB Safety-shape Steel Bridge Rail