How wide is the subgrade of a bidirectional eight-lane road?

1 Answers
VanLeilani
07/30/25 12:51am
Bidirectional eight-lane road subgrade is 2x15 wide. Components of a highway: The highway surface mainly includes several major parts such as the main road, ramps, and auxiliary lanes. The main road is the carriageway, which is divided from left to right into overtaking lanes, fast lanes, and slow lanes (travel lanes) according to different quantities. Ramps come in complex and diverse forms, including functional ramps, acceleration lanes, deceleration lanes, collector-distributor lanes, and turning ramps, depending on their specific functions. Types of highways: Depending on the scale of the road, highways are divided into three types: bidirectional four-lane, bidirectional six-lane, and bidirectional eight-lane.
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