As a 3 year PVD let me answer your original question. but before I do as you have found out we PVD"S are hated here. Even when I pay $40 plus Union dues every week for the 8 week and get nothing from the union but the job. So i'm ok with that. I'm a Greenskeeper(Golf course that hoops on to help and make money in off season).
As far as loading,, I sort everything by street instead of Pal. Look on map and try to join streets in same area together and take what ever fits in loads. I do not follow given route in order. I tackle harder or apartment or unlit areas first and leave the good areas for after dark. ie well marked address areas, some areas have addresses on mailboxes. Those are easy areas to do. but most times you will find our routes will be made up of the crappy, time eating areas cause they give it to us so the regular drivers can get more done, go faster, or do more pickups since we don't pick up.