Specialty I want to study

I introduced control engineering I want to major, but I waver in my judgment which I choose in this field.
One field is to control the operate trains. For example, Automatic Train Control (ATC) and Train Automatic Station Stop Control(TASC) are famous examples. In short, they lighten the fatigue of drivers and help the operation not to delay. There are many lines which don't adopt these system so I think this field will be needed in the early future.
Another field is to control the oscillation of cars. In short, it gives us comfortable ride. Actually, sound is also vibration of air. Have you ever experienced such a thing; the faster the super express is, the louder the noise is. I think it is necessary to control not only the oscillation of cars but also sound and travel by using trains will become more comfortable.
Of course, I want to study about train but these fields can apply for vehicles, planes and so on. Anyway, I have plenty of time to consider it, so all I have to do now is to study hard.

Koichiro Sasaki