Dual Line Mobile Retroreflectometers like the RetroTek-M are needed to measure the RL values and absence / presence of road markings. Dual Line retroreflectometer means that road markings on both sides of the car can be measured at the same time.
A pilot project on the measurement of the night visibility (retroreflectivity) of road markings on the main roads of Estonia using a mobile retroreflectometer. The contracting authority: Estonian Road Administration. Tallinn Report date: July 2017 Participated in the work of the contract: Mr. Tiit Kaal, Consultant: ERC Consulting Ltd. Estonia, Mr. Joe Turley CEO, [...]