Abstract: A signal device is usable with motorcycles or the like to identify the presence and direction of motion of the vehicle in limited visibility situations. A mast extending upwardly from the vehicle supports the signal lamp assembly above the vehicle. A pair of transparent domes secured on the signal lamp assembly in a forward-rearward relationship with respect to the vehicle enclose separate lamps. The domes are color-coded so that the forward and rearward ends of the vehicle are identifiable without actual visual contact with the vehicle. The signal device circuit may be interconnected with the vehicle indicator circuits so as to be operable therewith. The mast may be telescopically extended to provide greater ranges of visibility.