Mass transit, huh? Substitute "collective" for "mass" and you've got it. Mass transit is for sheep and cattle. With mass transit you leave from a point of the government's choosing, at a time of the government's choosing, to a destination of its choosing. With the private car you leave from a point of your choosing, to a destination of your choosing, at a time of your choosing. No wonder the collectivists hate the private car so much and fawn over boondoggles like the "big dig" in Boston.
--Boris
The Big Pig (yes, that's a deliberate slur) is a highway tunnel project. It has nothing (as far as I know) to do with mass transit.
You could have a nuclear-powered locomotive, too, with a closed-cycle gas-turbine engine.