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I’ve got an absolutely bonkers idea: add two or three passenger cars to the freight trains

Edit: Not sure why I’m being downvoted. This was a thing for a long time. https://en.m.wikipedia.org/wiki/Mixed_train

Cargo trains are usually quite long, slow to accelerate, and stop infrequently (comparatively, at least). Adding "two or three cars" would mean adding a very small amount of human capacity while forcing the cargo portion of the train to make many slow starts, and transporting people very slowly. While it is possible, it's a lose-lose for both cargo movers and potential passengers.

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