New trains with level platform capabilities could be added to the system using the same operating procedures as current trains. Once all trains are running, the platforms can then be modified. On the resort line, this could mean a full closure, or it could mean closing 1/2 of each platform at a time and running at reduced capacity. On the Express and Epcot lines, it could mean full closure, or it could be done by using only one side of the platform at a time, and dealing with the capacity restrictions that causes.