Big ideas like this one start conversations and new thinking that bring by great innovations. I love this concept by Priestmangoode:
The Moving Platforms concept was designed to address the infrastructure shortcomings that inhibit the optimum functioning of high-speed rail. Local trams connect to a network of nonstop high-speed trains. When a moving tram docks with a moving train, passengers can embark and disembark, transferring passengers to and from their local destinations without forcing the high-speed training to slow. The tram, in effect, acts as a moving station.