Third comes “returnability.” A two-car driveway between two curb cuts gives the best in-and-out access, if topography and finances permit. Lacking that possibility, the longer the driveway, the more you will need ample parking and turn-around space for your car, for the pickup, and for party guests…but most important, for an ambulance or fire truck. Consider a turning circle, a rectangular parking area, or parking-turnaround “T” at the driveway’s end. Turnaround posed very few problems with our own driveway. The carriage yard behind the house provided ample space and needed only a length of perforated pipe to drain it and a good layer of solid fill to raise and firm it. To read more follow the link below http://www.motherearthnews.com/diy/build-a-driveway-zmaz92aszshe