The first part of the dynamic testing of retro-reflection of longitudinal road traffic signs on  national roads in Croatia. It includes the measurement of the night visibility of longitudinal road traffic signs and dynamic measuring device in the entire length of the signs. In the second part of the project it will also be provided testing of traffic signs retro-reflection with the collection and processing of traffic signs data.

The results of all the above dynamic tests and base traffic signs are located in the modern software tool retro-reflection developed by the Institute. Department of traffic signs has all the latest equipment for all tests the quality of traffic signs, as they guarantee the quality of work of the Institute accreditation standards ISO9001 and ISO17025 by which is accredited.