If all you want is to be a bus driver or train worker, you could skip college and go straight to the bus or train companies and ask about a job with training.

No real need to go on a collage course for this type of work, get in touch with your local bus company and ask if they are hiring if they are and want to take you on they will put you through your test for your bus licence. Train drivers jobs are a little harder to come by but again do not require a collage course as such but the training is a lot more involved but the train company will put you through all the training you need. Be aware that usually you have to start working for a train company in some other capacity before the training becomes available i.e. host on a train working in the shop.

Well, yes there IS an advantage to going to a transportation school, that advantage is getting hired, with competition fierce for RR jobs, it looks very good on a resume to have some knowledge but mostly it shows a real desire and comitment to go to work in the RR industry. Dont think for a moment that the hiring officer will ignore that type of desire and commitment.
Some railroads actually reimburse new hirees for a portion of the tuition for RR colleges.
There is a 6 week course in Sacramento called Modoc RR college and I know there is a Community college in Kansas that offers an associate degree in railroading.
Google it, but I think it is something to look into if you are serious about going to work in the industry.
Good Luck!!

Why not take accountancy, civil engineering or mechanical engineering? That would qualify you for a better job than train or bus operation though there is not a lot wrong with them either. I used to know a lot of locomotive drivers, had two uncles who did it and my father was a rail worker too. All good people.

I like the idea of a logistics course too. Or even public relations, rail companies have opportunities for all sorts of people.