From the Orlando Sentinel today:
Walt Disney World is cutting operating hours for its monorail, a move designed to give maintenance crews more time to work on the aging transportation system.
Disney plans to begin shutting down monorail service one hour after regularly scheduled park closings in the Magic Kingdom and Epcot, the two theme parks served by the resort's trains. In addition, Disney will no longer run the trains during evening "Extra Magic Hours," the late-night period during which only guests staying in Disney hotels are allowed in the parks.