The Retrosign GR3 sign retroreflectometer meets all FHWA and ASTM requirements, and is equipped with GPS location capabilities and internal storage for 250,000 measurements. It has automatic stray-light compensation; uses a nickel metal hydride battery; and has road sensor control software to transfer results. Included with the system is a radio-frequency identification reader.
TAPCO, Elm Grove, Wis.
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