Disagree with lesser traction on one side as only likely hood. Different 
tire threads (depth of thread mainly), and weight distribution 
front/rear can have major effect of what's going to slide first. With 
both of my vehicles, I find turning to hard while braking is the time I 
feel the ABS or traction control take effect. Probably 2nd is on ice 
with straight stops.

Dave Tweed wrote:
> Michael Rigby-Jones wrote:
>
>   
>> To correct a locked wheel without such a system, a driver would have to
>> reduce braking effort to all four wheels, which increases overall
>> stopping distance.  Since the maximum grip available from any particular
>> wheel will vary, to prevent (rather than correct) locking a driver will
>> have to reduce the total braking effort to the level of the wheel with
>> the lowest grip.  Having a higher braking effort to 3 wheels and
>> allowing the ABS to cope with the other one will very likely give
>> shorter stopping distances.
>>     
>
> That's a specious argument if I've ever heard one.
>
> Unless you're already FUBAR (skidding) by the time you hit the brakes, the
> wheels tend to follow one another on each side of the car. In other words,
> it's extremely difficult to be in a situation in which you have just one
> wheel with poor traction when you need ABS.
>
> More likely, BOTH wheels on one side of the car will have poor traction,
> and ABS won't perform any better than hard braking without it. You're going
> to have directional control problems in any case.
>
> -- Dave Tweed
>   
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