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路牙石也称道牙石或路边石、路沿石。路牙石是在路面上区分车行道、人行道、绿地、隔离带和道路其他部分的界线，起到保障行人、车辆交通安全和保证路面边缘整齐的作用。 Luyashi also praised the calculus or roadside stone, along the stone road. The road calculus is to distinguish between lanes and sidewalks, green, belts and other sections of the road line on the road, pedestrians and vehicles to ensure traffic safety and ensure road neat edge effect. 路牙护坡是指城市主次干道上一些单位和沿街门店商户，为自身便利和利益，擅自在道路两侧车行道和人行道之间，利用水泥和砖块浇筑或摆放铁制模具，连接车行道和人行道的护坡。路牙护坡对城市市政设施尤其是人行道带来很大危害，不仅影响了行人通行和城市道路美观，阻碍了城市交通的通顺;而且让车辆很容易就驶上人行道，阻碍行人通行，造成人行道地砖受损，影响广大市民的出行安全;同时，有些护坡埋住了城市排水井口，阻碍雨水的正常排出，造成道路积水并引发城市内涝。 Slope road teeth is refers to the city primary and secondary roads on some units and street stores businesses, for their own convenience and benefits, or between both sides of the road and the roadway pavement, cement and bricks by pouring or placing iron mould, connecting roadways and sidewalks for slope protection. The slope of City Road teeth of municipal facilities especially the sidewalk has brought great harm, not only affects the pedestrian traffic and city road appearance, hindered the traffic in the city; and let the vehicle easily onto the sidewalk and hinder pedestrians, resulting in sidewalk tile damaged, affect the safety of public travel; at the same time, some buried slope protection the city drainage wellhead, hinder the normal discharge of rainwater, causing Road water and caused waterlogging in the city.