I actually counted these two: https://i.kym-cdn.com/photos/images/original/002/417/129/282...

If it's an average of 1.2 persons per car (which is the typical average) and counting roughly 1,200 cars on those images (in aggregate) it would take roughly 28-29 rail cars to transport this number of people.

That's 3-5 trains worth. All that traffic could have been saved (in theory) by 3-5 trains.

I don't imagine a train would serve all those people, but imagine the massive dent it would make to have good train systems between large population centers.