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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
LS-47 NCHRP 350 Akron Foundry Luminaire Supports TS-1000 and TS-1000Modified threaded traffic signal bases
LS-26B NCHRP 350 Sherman International Luminaire Supports Additional poles accepted
LS-44B NCHRP 350 Valmont Luminaire Supports Use of ASTM A574 fasteners in above coupling
LS-46 NCHRP 350 Region 7 Luminaire Supports Nebraska and South Dakota Road Closure Gate
LS-44A NCHRP 350 Valmont Luminaire Supports Production Model of above Breakaway Coupling
LS-45B NCHRP 350 Transpo Industries Luminaire Supports Production Model of Double Neck Pole Safe Coupling
LS-44 NCHRP 350 Valmont Luminaire Supports Breakaway Coupling / Miniature four-bolt slip base
LS-45A NCHRP 350 Transpo Industries Luminaire Supports (LS 45 and ls45A are for the Prototype coupling)
LS-26A NCHRP 350 Sherman International Luminaire Supports Additional poles accepted
LS-45 NCHRP 350 Transpo Industries Luminaire Supports Double Neck Pole Safe Coupling for signs and luminaires.