Speed bumps & speed humps - controlling vehicle speed with a plastic speed bump or rubber speed hump is an effective method to improve the safety of any parking lot or roadway.Help to reduce vibration when you drive in or out through the ramps,thus to protect your car and terrains.These speed humps are ideal for hospitals, hotels, private colony, malls, parking areas, and high prone accident areas.Buy rubber speed hump, rubber speed bump, plastic speed hump, plastic bump, sleeping police ramp at best factory price in Chengdu RongXiang Technology Co.,Ltd specilizing in manufacturing traffic safety equipments.