Airport Van Rental is the ACE vehicle provider in San Francisco. Proceed up to fourth level and take the Blue Line Train going to the car rental center. Once off the train proceed down to ground level and follow the signs to off airport rental shuttle pick-up.(also known as Kiss and Fly)Shuttle will take customer to counter 10 minutes away. ACE is a short shuttle ride from the terminal. From the baggage claim area call 1-650-952-5543 for shuttle pickup.