Road Height Restriction Bar, Hydraulic Liftable Height Restriction Bridge, Landscape Gateway Frame. This product is customizable; for specific pricing and configurations, please call for details. The intelligent liftable height restriction bridge is mainly used for road construction services at urban elevated bridge ramps and underpasses. It is a gate-type structure installed at the entrance of bridges, culverts, and tunnels, typically made of steel structure焊接. It serves as a protective measure for bridges, culverts, and tunnels; equipped with signage indicating the height restriction in meters, it is used to alert vehicles.