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爬坡車道是在公路（尤其是高速公路）陡坡路段的主行車道外側增設的供大型載重車輛通行的專用車道。在爬坡路段，大型車輛因爬坡能力不足，會造成大小車輛之間的速度差變大，小型車加、減速頻率和變道超車需求增大，極易發生追尾、側碰等交通事故，設置專用的爬坡車道可以提高道路安全性和通行效率。[1][2][3][4]
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