Abstract: A signaling device comprises a housing, the housing being arranged for mounting on a roof section of an emergency vehicle, the housing having an upper housing portion and a lower housing portion, a transfer portion for transferring the upper housing portion relative to the lower housing portion between a closed position and an open position, the upper and lower housing portions being further provided with complementary peripheral regions which, when engaged in the closed position, form a weather resistant inner chamber, the upper housing portion having an inner surface, a plurality of signaling elements mounted on the inner surface, the inner surface and/or the signaling elements being operable to be visible to oncoming traffic when the upper housing portion is in the open position.