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Coach bus drifts down an icy hill.
(imgur.com)
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this post was submitted on 11 Oct 2024
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So the Anti-Lock Brakes don't work because they are locked up?
Yeah, this has been my experience. I've got ABS on my current car but in winter the main advantage they provide is letting me know when it's time to pump the brakes if I need to come to a stop. The times I haven't pumped, let's just say I was lucky that no one else was going through that intersection at the time.
I suspect they are tuned to avoid locking up the wheels in conditions other than ice/slick snow and the pulse is too quick for the tires to get traction when it releases.
Yep if all the wheels are locked up it just thinks you are stationary, ABS only kicks in if there is a difference like it front wheels lock but back wheels are rolling. Smarter systems (like on bikes) would also monitor motion.