Most of the information received by a driver is provided by road signs and markings, especially in low visibility conditions and at night. While road markings mainly show the boundaries of the road, traffic signs inform, indicate, forbid, oblige, orientate and warn of risks and dangers. This paper describes a method for dynamically measuring traffic sign luminance as perceived by the driver of a typical European car on an empty and unlit road, without causing discomfort to other drivers on the road.
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