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北京市二环路全长23.7公里,是环绕城区的主要交通干线,是在拆除旧城墙,铺设环城地铁后于1981年建成。现在整个干线两侧留有宽数米到数十米不等的绿带,如同一条绿色项链,给首都倍添生机。整治前的二环路,除分车带、立交桥周围和少数地段进行绿化外,大多数地段留有大量工棚料场、临时建筑、违章建筑,堆物堆料处
The Second Ring Road in Beijing, with a total length of 23.7 kilometers, is the main traffic artery that surrounds the urban area. It was completed in 1981 after the demolition of the old city walls and the laying of the Metro Ring in the city. Now the entire trunk left on both sides of the width of tens of meters to tens of meters of green belts, as a green necklace, to the capital times vitality. Before the renovation of the Second Ring Road, in addition to sub-car belts, overpass and a small number of lots for greening, the majority of lots left lot yard, temporary buildings, illegal buildings, heap materials