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車行道隔離設施是用來分隔對向或同向行駛的交通流，并有禁止車輛左轉進出行駛和行人任意穿越道路的作用，一般設置在道路中心線上或車道分隔線上。車行道隔離設施分為車行道中心隔離設施（分隔對向）和車行道分界隔離設施（分隔同向）。2．車行道隔離設施主要采用三種形式：綠化分隔帶、隔離護欄、混凝土防撞墻。在市區范圍內，優先選取的形式依次為綠化分隔帶、隔離護欄；在市郊范圍內，優先選取的形式依次為綠化分隔帶、混凝土防撞墻、隔離護欄。
1. Lane separation facilities are used to separate the traffic flow of opposite direction or the same direction, and have the function of prohibiting vehicles from turning left in and out and pedestrians crossing the road arbitrarily, which are generally set on the road center line or lane separation line. The isolation facilities of the carriageway are divided into the central isolation facilities of the carriageway (separating the opposite direction) and the dividing isolation facilities (separating the same direction). 2. There are three main types of isolation facilities: green separation belt, isolation guardrail and concrete anti-collision wall. In the urban area, the preferred forms are green separation belt and isolation fence; in the suburban area, the preferred forms are green partition belt, concrete anti-collision wall and isolation fence.
主要的目的是為了能夠管理人行道和機動車道的分離，并且對于車流和人流的控制也是特別的穩定，不僅能夠很好地管理城市道路交通的安全性，也能夠避免出現一些極端情況所造成的交通事故，既可以讓交通環境得到更穩定的保障，也能夠讓城市的道路交通環境得到凈化和美觀的效果。
The main purpose is to be able to manage the separation of sidewalk and motorway, and the control of traffic flow and pedestrian flow is particularly stable. It can not only well manage the safety of urban road traffic, but also avoid traffic accidents caused by some extreme situations. It can not only ensure the traffic environment more stable, but also make the urban road traffic environment more stable The effect of purification and beauty is obtained