中央隔离岛（Median Barrier） 中央隔离岛是设置在交叉口处，并沿主路中线延伸的交通岛，其长度大于支路进口的宽度，以阻断来自支路直行车流。
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hatch of interval median barrier 中分带开口
metal median crash barrier 金属防撞栏
median n barrier 中央路栏
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Officials opened a removable barrier in the roadway's median to allow emergency vehicles quicker access to trouble spots.
NPR: Snow Storm Barrels Through Midwest To Mid-Atlantic
The bus went off the right side of the road, hit a barrier, swerved left across lanes of traffic and struck a concrete median in a grassy area, Department of Public Safety Sgt.
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