单轨高架铁路网有助于缓和交通阻塞。
单轨火车是交通繁忙地区所使用的另一种火车，它在街道上空的高架铁轨上行使，迅速地将人们运送进城来或送出城去。
The monorail is another kind of train used in busy places. The train hangs from a rail high above the streets and it carries people quickly in and out of the city.
钢筯混凝土构件及所有平台、楼梯、高架板及单轨。
Steel and concrete structural components as well as all platforms, stairs, elevated slabs and monorails.
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