ABS

[Tom Cloud]

>And it is this slow speed turnoff that allows so many people to skid 
>(literally) hundreds of yards on ice.  How far do you think you can 
>skid with the wheels locked versus reasonable application of the 
>brakes on ice.  For myself (perhaps not everyone), I find it easier to 
>try to keep from skidding in the first place on ice and to maintain 
>some control over which end of the car hits (or, perhaps misses) the 
>tree.  One has no chance of doing  this even at VERY slow speeds 
>unless the wheels are turning!

That's why you downshift to a lower gear -- so the motor will
fight the brakes a little and keep the wheels from locking up

Tom Cloud <cloud at peaches.ph.utexas.edu>