The ornamental design for a extensionarm with light for a roadconstructionmachine, as shown and described.
FIG. 1 is a front side view of a third embodiment of the design for an extension arm with a mirror for a road construction machine in the present invention.
FIG. 2 is a left side view of the design for an extension arm with a mirror for a road construction machine in FIG. 1.
FIG. 3 is a rear side view of the design for an extension arm with a mirror for a road construction machine in FIG. 1.
FIG. 4 is a right side view of the design for an extension arm with a mirror for a road construction machine in FIG. 1.
FIG. 5 is a top side view of the design for an extension arm with a mirror for a road construction machine in FIG. 1.
FIG. 6 is a bottom side view of the design for an extension arm with a mirror for a road construction machine in FIG. 1.
FIG. 7 is a perspective view onto the front side and top side of the design for an extension arm with a mirror for a road construction machine in FIG. 1; and,
FIG. 8 is a further perspective view onto the rear side and top side of the design for an extension arm with a mirror for a road construction machine in FIG. 1.