This document provides guidelines for use of LED-embedded static traffic signs (LETS) on Canadian roads. The conspicuity of a static traffic sign may be increased by embedding light emitting diodes (LEDs) on the sign face. LEDs on the sign face may also serve to increase the legibility distance of the sign by highlighting the sign message or the outline of a uniquely shaped static sign. Due to the potential for LED-embedded traffic signs to be distracting, and because excessive use may decrease the effectiveness of similar static signs, LED-embedded traffic signs use should be limited.
To take advantage of the shape-recognition advantage provided by LETS, LETS should be restricted to STOP signs, YIELD signs, and the stop side of the STOP/SLOW paddle as these are uniquely shaped signs and are most easily recognized from shape alone.
The document is intended as a reference for traffic engineering practitioners and supplements the Manual of Uniform Traffic Control Devices for Canada (MUTCDC), which is the primary reference document for practitioners concerning traffic control devices design and use.
Disponible en français : Pratiques recommandées pour les panneaux de signalisation à DEL (PSD) (2011)
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