You can conveniently and sanitarily urinate while in the front seat of your car if you're parked and there is nowhere else to go outside. Just have a handy large bottle or she-wee. Slide the bottom of your seat back if needed, get on your knees facing the headrest, and do your business in the vessel. You could lean into the seat and act like you're trying to get something out the back seat. This saves so much time when traveling.