高速公路与普通道路相比，具有明显的级差效益，道路使用者选择高速公路的原因来自于其时间上的节约、车辆行驶成本的节约及舒适性的提高。
Compare with the general road, expressway have a clear differential benefit, the causes of road users to choose the expressway from its time-saving, cost-saving and comfort.
高速选择器通道部件HSC ？
高速选择器通道部件HSC ？
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