I will be driving to the airport Monday, Dec 27. I called several of the private lots, who told me they are full. When I checked at the SJC airport website, it had a big message saying "This year everyone who parks at the Airport is guaranteed a space, either in the Long-term lot on Martin Avenue or Short-term parking directly across from the terminals."

Does anyone know how this works? How do they implement the guarantee? If the LT lot is full, do you get a voucher to pay LT rates in the ST lot? What if both are full?