Caltrain and VTA light rail

Whenever I get on the Caltrain, I am surprised at the size of it. I have to say it is clearly the American size.

Today I got on the Caltrain and the VTA light rail. Although I forgot to take a picture of the light rail, it is the small train on road.

It costs $1.75 to take the light rail, nobody seems to check it though. However it's necessary to pay the fare if you don't want to be arrested suddenly. (I have seen the scene that someone was arrested at Los Angeles.)

A problem for passengers is that we have to pay money for the ticket by $1, $5, or $10 bills or quarters. Today I was very embarrassed because I didn't have any bills such like those on the way back. We have to have many $1 bills or quarters always.