FIG. 1 is a front perspective view of an illuminated changeable warning signal showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is the side elevational view thereof, the opposite side being a mirror image;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front perspective view thereof with the rear panel being pivoted over to the front of the signal. When this "slow" signal is pivoted to completely cover the front "stop" signal the front and rear faces of the signal both read "slow" as shown in FIG. 3.