Road blockers are especially designed for entrance points which have a threat of vehicle attack or for the ones that have high security requirements. If there is a threat of vehicle attack in addition to the control of vehicle access in high security applications, hydraulic road blockers are the unique solution and the most secure systems. Even though the attack occur from high tonnage vehicles with high speeds, its not possible for the vehicle to keep on moving because of the damage given to front, wheels and the bottom of the vehicle. Its raiselower function by electronics control, can be achieved by every kind of card readers, biometric readers like fingerprint or hand shape, radio control, onoff key switch etc. Besides, safety accessories like photocells, inductive loop detectors, flashing lights or redgreen traffic lights can be integrated to the system very easily.