​Make a passenger rail line on a loop which is just an endless conga line of train cars. Never wait for your commute again

Boarding and deboarding might cause some injury, but that will help ease congestion as those who don’t really want/need it won’t bother. If you’re in a rush you can just run through the train cars. Put them on an elevated line with a view and have some nice dining cars. The Flattened Ferris Wheel design