A pedestrian crossing signal which incorporates a face plate having a "WALK" symbol and a "DONT WALK" symbol. The "WALK" symbol is illuminated by a mercury vapor tubular lamp mounted on the planar rear wall of a housing and which emits white light, and the "DONT WALK" symbol is illuminated by a neon tubular lamp also mounted on the planar rear wall of the housing and which emits red or orange light. At least a portion of the rear wall of the housing on which the tubular lamps are mounted is formed of heat conductive material. This material serves to conduct heat from the neon lamp to the mercury vapor lamp when the former is illuminated to obviate any likelihood of failure of the mercury vapor lamp to become illuminated when it is energized even in cold weather.
