Anti-collision self-resetting clearance limit frame on overpass highway/railway overpass

The invention relates to a height limit frame on a road, in particular to an anti-collision self-resetting clearance limit frame on an overpass highway/railway. The clearance limit frame comprises an interception steel cable, U-shaped beams, A-shaped mast frames, brackets, fixing and adjusting seats and a positioning stay cable, wherein the bottom ends of both the U-shaped beams and the A-shaped mast frames are fixed on concrete foundations; the A-shaped mast frames are positioned on two sides of a highway respectively and are parallel to the highway; the U-shaped beams are arranged on the outer sides of the A-shaped mast frames respectively; the A-shaped mast frames are arranged vertically; the included angle between the U-shaped beams and the vertical direction is 0-90 degrees; the brackets are arranged above the A-shaped mast frames; the U-shaped beams, the A-shaped mast frames and the brackets are connected through the fixing and adjusting seats; dampers are arranged in the U-shaped beams; the interception steel cable is arranged over the highway; the two ends of the interception steel cable are arranged in the U-shaped beams on two sides of the highway respectively and fixedly connected the dampers; the positioning stay cable is arranged at the top ends of the brackets and positioned above the interception steel cable. The clearance limit frame is simple in structure, plays a role in forcing super-elevation cars to stop, and better guarantees the driving safety of a railway.