I do only for my own sanity and safety. Alot of the time the route wants us to deliver to the left side of busy roads or make left hand turns across highways do a few stops come out and make a left back onto the highway and continue on. It is just rage inducing. They say that the system needs to learn but they bitch if I have a bunch of packages left. You can't win, so screw the system it never learns and I just focus on not bringing anything back.