We were told to stay on our own area a few years ago. Your probably OK to go off a little bit if you run it by your supervisor. I sometimes hit the mall or a shopping center off the interstate on the way back in.
Its really comical at our center. With us being on PAS/EDD, I never know what city I will be in from one day to the next. Some days I stay in the south end of the loop I am in, and the next day I will be pushed way up into the middle of the loop, which is in a completely different city and county, so could you say that any where in the loop I drive in is considered on area. Im sure I would get different views from different sups.