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随着我国经济的快速发展,特别是高速公路网的逐渐形成,沿海地区的高速公路交通流量增长迅猛,有些四车道高速公路的交通流量已达到或超过了设计流量,某些路段稍出现意外,就形成长距离的堵车现象。对交通流量接近、达到甚至超过设计流量的四车道高速公
With the rapid economic development in our country, especially the formation of the expressway network, the expressway traffic volume in coastal areas has been growing rapidly. Traffic volume of some four-lane expressways has reached or exceeded the design flow rate, and some sections are slightly surprised. A long-distance traffic jam is formed. Close to the traffic flow, reaching or exceeding the design flow of four-lane highway