Image-variable position-movable self-cleaning signboard in expressway tunnel

The invention discloses an image variable position movable self-cleaning signboard in an expressway tunnel in the technical field of expressways, and the signboard comprises a fixed plate which is of an L-shaped structure; the signboard assembly comprises a fixing box arranged on the vertical section of the fixing plate, guide rods are arranged on the two sides of the interior of the fixing box, the two sets of guide rods are slidably sleeved with fixing rods, signboards are arranged at the front ends of the two sets of fixing rods, and teeth are arranged on the opposite sides of the two sets of fixing rods. The fixing rods and the teeth penetrate through the top of the fixing box, by arranging the connecting rods with the same bending degree as the tunnel, when a traffic accident occurs in the tunnel, the round rod moves between the two sets of connecting rods through the pulling device, the round rod is supported through the supporting plate, and the traffic accident can be prevented. Therefore, the signboa