The Bus system has two different ways buses are Dispatched, In the Mornings prior to 11 am, The Buses are Dispatched from the closest Theme Park Location, (Meaning for instance, Magic Kingdom Bus Area dispatches all the park routes going to and from the MK Area Resorts), , After 11 am the buses are Dispatched by the Location itself so a Bus going to Animal Kingdom would come from the Animal Kingdom area when picking up at the Contemporary, Poly, Grand or Fort Wilderness. Magic Kingdom doesn't handle the Dispatch for routes going to other parks from the MK Area Resorts after the 11 am time. What happens though, is there is a Transition time from when MK drops the route and the AK picks up the responsibility to send the Bus and many times there are Delays during that time.