Can road signs be illuminated to improve their visibility?

Question

DentroTest · Accepted Answer

Yes, traffic regulations state that road signs must be visible and legible both day and night. To ensure this, especially in low-light conditions, signs can be self-illuminated (internal lighting) or retroreflective (reflecting headlight beams). The only restriction is that this illumination must not dazzle drivers or alter the regulatory colors or shapes of the sign. Therefore, illumination is not exclusive to traffic lights.

Can road signs be illuminated to improve their visibility?

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