When a vehicle leaves an expressway, it should reduce speed in the deceleration lane before entering the ramp.
车辆驶离高速公路时，应当经减速车道减速后进入匝道。
Interchange is an important part of expressway, and the deceleration lane of interchanges and the diversion point are important indexes of alignment design of interchanges.
互通式立体交叉是高速公路的重要组成部分，而互通式立交减速车道和分流点又是互通式交线形设计的重要指标。
The bridge decking width adjustment design was introduced to solve the problem of consistency between the outside profile of acceleration-deceleration lane and road alignment.
为了解决互通式立交中位于加减速车道上桥梁外边线与路线线形的吻合问题，提出了采用不同板宽调整桥面宽度的设计方法。
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