And why do some tractors have pre pass and some don't?
As far as I know UPS doesn't have prepass in the sleeper, at least 3-4 yrs ago they didn't, would save a little time. (And time is money) You'll go thru a toll booth with a 5 axle ezpass bobtailing, I figure the bean counter figure the time savings is worth not paying a driver for sitting on line.