Disney has today announced that a both the Walt Disney World Railroad and The Tomorrowland Speedway will be interrupted during the construction of the new TRON coaster at the Magic Kingdom.
The Walt Disney World Railroad will temporarily take up residence at the Main Street Station starting in December 2018, pausing its grand-circle tours of Magic Kingdom Park. During this time, you will be able to get an up-close look at the railroad and take advantage of one-of-a-kind photo opportunities.
The Tomorrowland Speedway will close for a portion of 2019, as the attraction’s track is adjusted. It will reopen as the same attraction in the summer of 2019.
Source: WDWMagic.com