Overly cautious is better than not cautious enough I would think. Your job as a driver is to get your partner and pt. to their destination in a safe, efficient, and as comfortable as possible manner. If you have a bad sense of direction, then you need to work on that. Bring your GPS if you need it, but, you should not be relying on it for every run. If you have trouble with street locations, sit down with your phone book, they usually have a city map in it. Learn how the house numbering systems work in your area. Get to know the "main" roads around and how best to utilize them to save time. Again, you have two people in the back of the truck, any G-forces you feel in the front will be multiplied by a factor of 10 in the back. If you are uncomfortable driving, talk to your supervisor and see if there is some sort of training program with your service.