With the constant construction of expressways in China and increasing number of vehicles, traffic accidents are rising, so it is increasingly important to study the safety control in expressways.
随着我国高速公路的不断建设，机动车保有量的持续增加，交通事故呈上升趋势，开展高速公路的安全管理研究也日益重要。
With the constant construction of expressways in China and increasing number of vehicles, traffic accidents are rising, so it is increasingly important to study the safety control in expressways.
随着我国高速公路的不断建设，机动车保有量的持续增加，交通事故呈上升趋势，开展高速公路的安全管理研究也日益重要。
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