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Climbing lane
Type of road
Type of road
A climbing lane, crawler lane (UK), or truck lane, is an additional roadway lane that allows heavy or underpowered vehicles to ascend a steep grade without slowing other traffic. They are typically used by large trucks or semi-trailer trucks, which go uphill more slowly than they travel on level ground. They are often used on major routes such as motorways and interstate highways.
Downhill lanes
Some climbing lanes extend slightly over the crest of the hill, to allow slow vehicles to regain speed.
As trucks and recreational vehicles must use low gear to descend slowly, an additional lane may also be built on the downhill side. This prevents the vehicles from overusing their brakes, which may overheat and cause a runaway vehicle.
Some downhill truck lanes may also have a nearby runaway truck ramp, which can help catch and slow down runaway trucks that have brake failures to prevent a serious collision.
References
References
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
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