Easy by driving the car out of the city and drive back at the end of the arrow. some levels have open city exits. and some levels if your really creative you car fit perfectly through the alleyway and drive in a other alleyway back in to the exit point. I hope this have helped you.
We wanted it open for a reason. I think fun little things like this are what make a great game. However, most of that was due to running out of time. 2 days (1 day wasted on idea) for a jam is really hard on a full 3d game. We have plans to expand upon it and tighten up those things, or make them part of the map.