Disney transportation is an overwhelmingly massive system with cool air conditioned buses, boats and monorail for speedy and efficient transportation of people from one end to another end of the park.
One can ride own car up to the magic kingdom and leave in the parking lot and take a short walk or ride a tram to the transportation and ticket center (TTC). It is the central hub for the transportation. Disney transportation takes care from this point forward. One can choose the mode of transportation when there is more than one option. Some of the parks like EPCOT center or the Disney/MGM Studios are adjacent to the parking lots where one does not need Disney transportation.