Monitor retroreflectivity levels to maintain compliance with FHWA
RetroSign GR3 Retroreflectometer measures the retroreflection of traffic signs with laboratory precision, according to distributor. Measures the coefficient of retroreflection to FHWA and ASTM standards. Records multiple observation angles with one squeeze of trigger. Meets ASTM, CEN and CIE specifications. Unit includes heavy-duty carrying case, NiMH battery and 110-volt charger, carry strap, calibrator, lens reducer and cap. Traffic and Parking Control Co. Inc., Elm Grove, Wis.