Safer entrance and exit from the driveway can prevent accidents and injury on that day when you are in a rush or really distracted by a problem and have to back out of a narrow driveway into a busy street or a blind curve and just don’t look well enough. It always happens at the worst time.
Planning the entrance needs to take into consideration the angle of intersection with the road. Vehicles that have restricted side views cannot get out safely if the angle is greater than 60 degrees. A clear line of site is needed for all driveways. As the speed increases the distance needed goes way up. An example would be the following recommendations, 130 feet for roadways with a 20 mph speed limit it increased to 1,050 feet for roadways with a 60 mph speed limit.