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Administrator 2009 SLK 55 AMG/Founding Member 2006
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98,112 Posts
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Watch How Quickly a Runaway Truck Ramp Stops an Out-Of-Control Big Rig



You've probably passed by dozens of runaway truck ramps without ever paying much attention to them. To a driver in a normal family vehicle, they're largely irrelevant.

But to a big-rig driver, they can be a life saver.

Caltrans just published this video on its Facebook page, showing an out-of-control 18-wheeler rounding a curve and grinding to a halt in a gravel escape ramp. The surveillance camera video is slow and choppy, but it shows one thing very clearly: That truck came to a stop very quickly.

The principle behind this type of runaway truck ramp couldn't be simpler: It's essentially a short paved apron leading into a long chute of loose gravel. The resistance of the gravel brings the truck to a halt almost immediately, while allowing a little bit of directional control.

Take another look. From the moment the truck hit the gravel to the time it came to rest, it only traveled about four truck lengths. Even if the truck's brakes were working perfectly, it probably couldn't have stopped so quickly.

Here's hoping this is the only time you have to witness a runaway truck ramp at work.
 

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Premium Member 1999 SLK230-sold
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15,438 Posts
Nope never had to use one and try to keep it that way. I have seen several trucks going into the gravel. It is fascinating watch them "Super Truckers" fly by you with smoking brakes and a couple of miles down the road they look at you totally confused while sitting in the gravel.
 
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