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How Many Lanes Does a Highway Generally Have?

1 Answers

CalvinLee

07/30/25 3:08am

According to the scale of the road, highways are divided into three types: two-way four-lane, two-way six-lane, and two-way eight-lane. The highway surface includes several major parts: the main road, ramps, and auxiliary lanes. Below is a detailed introduction: 1. Main Road: The main road is the carriageway, which is divided from left to right into the overtaking lane, fast lane, and slow lane (travel lane). 2. Ramps: Ramps can be subdivided into interchange ramps, acceleration lanes, deceleration lanes, approach lanes, collector-distributor lanes, and turning ramps. 3. Auxiliary Lanes: Auxiliary lanes include emergency lanes (emergency stopping areas), U-turn lanes, climbing lanes, escape lanes, and cooling pond lanes.

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