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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
WZ-222 NCHRP 350 POCO Incorporated Work Zone Devices POCO 4x5 Sign Stand
B-143 NCHRP 350 Wyoming DOT Longitudinal Barriers and Bridge Rails Box-beam transition to concrete
SS-132 NCHRP 350 Sign Support Systems Sign Supports, Mailboxes, and Delineator Posts Break Out Coupler
WZ-223 NCHRP 350 3D Specialties Work Zone Devices Minnesota Portable Sign Support
Minnesota
Portable Sign Support
Portable Sign Support
WZ-220 NCHRP 350 Yodock Work Zone Devices Slimline Channelizer Model 2001SL
B-142 NCHRP 350 Composite Structural Design, LLC Longitudinal Barriers and Bridge Rails Steel roadside barrier @ TL-5 (Max-Rail)
SS-130 NCHRP 350 Northwest Pipe Company Sign Supports, Mailboxes, and Delineator Posts PSST Slip Base
LS-59 NCHRP 350 Component Products Luminaire Supports Cast Aluminum Pedestal Bases
WZ-221 NCHRP 350 Mathy Construction Co. Work Zone Devices Mathy Construction Co.
WZ-219 NCHRP 350 Missouri DOT Work Zone Devices Ground Mounted Temp. Sign stand