The Hydraulic Road Blocker are widely used in highway toll stations, checkpoints, airports, agencies,embassies, customs, banks, industrial and mining enterprises, ports, warehouses, parking lots, and all places where vehicle traffic is restricted. 1.The placeman sends instructions through the control system, and the hydraulic transmission enables the roadblock device to quickly ascend and descend. 2.Vehicle passes 3.The roadblock is automatically lifted and lowered by the inductive detection automatic command of the roadblock device or the manual button operation; to control the lane, the door is released or closed. To effectively prevent vehicles from forcibly punching cards.