this morning came upon an accident scene in the fog on black ice and almost became involved in a terrible 10 car pile-up with multiple injuries and maybe a fatality. i gently hit the brakes and immediately my tractor and two trailers started going sideways. fortunately because of many years of experience and a LOT OF LUCK I reacted just right on releasing brake, hitting the throttle , and applying the hand valve slightly , to right the rig and slow to a stop before adding to a bad situation. LUCKY and I know it. with ABS, this all would not happened. we have ABS equipment that I have tested in snow and ice and a set stays straight even while applying heavy brake action. but every piece of equipment in a set ( tractor, trailers, and dolly ) has to be ABS for it to work and we have a lot of non ABS equipment. "SAFETY FIRST" Ups. don't scrimp. let's get into the 21st century with all of equipment being ABS.