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# what is an escape lane for how does it work ? what is change in momentum ?

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1. Help I am studying GCSe OCR Physics and I am stuck in trying to explain

What is an escape lane for how does it work ? what is change in momentum ? stopping force / stopping time etc very confused ....
2. (Original post by Ward6)
Help I am studying GCSe OCR Physics and I am stuck in trying to explain

What is an escape lane for how does it work ? what is change in momentum ? stopping force / stopping time etc very confused ....

When you've got a road going down a steep hill into a town there's a risk that a vehicle might have brake failure on the hill and be unable to control it's speed.
The escape lane is a strip of deep gravel similar to the gravel traps used in motor racing circuits onto which the driver of a runaway vehicle going downhill can steer.

In the USA they're called runaway truck ramps. Here's one in action

and here are some American highway engineers explaining how their newly installed one works

and here's a british one on the A6 near Bakewell in google street view - which looks quite wimpy in comparison to the ones the Americans have :/
https:[email protected]..8i6656!6m1!1e1
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