The ornamental design for a signal for indicating the proximity of vehicle, as shown and described.
FIG. 1 is a perspective view of a signal for indicating the proximity of
vehicle showing our new design with the wires broken away to indicate
indeterminate length;
FIG. 2 is a top plan view thereof, the bottom being the same in appearance;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a front elevational view thereof, the rear being the same in
appearance; and,