Complex sentence: Starting in 1998, race spectators were diverted to park at Epcot, and were taken by shuttle bus to the Speedway while guests to the Magic Kingdom were directed to park, as usual, in the Magic Kingdom parking lot.
Split into simpler sentences: Starting in 1998, spectators to the race events were diverted to park at Epcot, and were taken by shuttle bus to the Speedway. Visitors to the Magic Kingdom were directed to park as usual, in the Magic Kingdom parking lot.