This driver would also be at fault if they drove through a stop sign or sped through a red light, and the other driver would have been able to complete a safe turn or pulled out of the driveway safely if not for these important laws having been broken by the other driver.
You may even be in the clear, if you are ever involved in this type of accident, if something outside of your control interfered with your ability to make the traffic maneuver as quickly as you would have been able to otherwise. Interference could occur with a sudden, unexpected vehicle malfunction, a pedestrian suddenly interfering with your turn, or even a bumble bee entering your vehicle.
Just as you should do after you rear-end another driver, you should always contact both the police and an auto accident attorney directly after this type of accident occurs. Also, politely ask witnesses to stick around and speak to the officer and your attorney. If they have to leave before anyone else is on the scene, then ask for their names and phone numbers, so they can report what they saw at a later