The ornamental design for a highwaysignal, as shown and described.
FIG. 1 is a perspective view as seen from the oblique front of a highway
signal showing my new design.
FIG. 2 is a perspective view as seen from the oblique rear on the same
scale as shown in FIG. 1.
FIG. 3 is an enlarged fragmentary rear view of the horizontal arm, the
remainder of the arm and vertical post being omitted for convenience of
illustration.