It can achieve a desired traffic density along the mainline of a freeway, and can make vehicles travel more efficiently and safely.
它可以实现所需的交通密度，高速公路主线，并能使车辆行驶更安全、更安全。
It can achieve a desired traffic density along the mainline of a freeway, and can make vehicles travel more efficiently and safely.
它可以实现所需的交通密度，高速公路主线，并能使车辆行驶更安全、更安全。
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