how many times will they meet.

There are two towns with distance of 60 miles. Every ten minutes there is a car leaving each town toward another town. Becasue cars from each town are facing each other they will meet on the road. If you are a driver of one car, how many cars will you see on the road that come from another town? Please include the car that has just arrived when you leave your town and the car that is about to leave when you just have arrived at the another town.