This is what i know about ABS, i read it from the STAR n NST weekly car section.. this article was written by ppl who has PHD in automobil engineering..
The use of ABS is installed to prevent the wheels from locking up other intense braking or jam brake u might say... When the wheels are not lock free to roll, this will allow u to have some control over the direction of the car and allow u to swurf out of danger(like big big lorry infront)..
Where else without ABS.. when u hit ur brakes that hard ur wheels lock up as a u wouldn't be able to steer ur car as the car would slide towards the the original path of motion which is going straight.. and hence if there is a big big lorry u will kiss it nicely..
As for braking distance, i remember reading it saying that cars with ABS does not have a shorter stoping distance.. actually it has a longer stoping distance compare to car's without abs.. this is because cars with ABS would take a rather longer time b4 the wheels come to a full stop, where else cars without ABS would have the wheels lock immediatly and if the grip of tryes is good, u will be able to stop faster
This can be seen in formula1... cars there do not use abs once they lock their brakes u see what happen.. they just cannot manover their car.. hope this helps ya question and if i'm wrong feel free 2 correct.. haha