Electrified Bus and Train?

Question

Why no passengers get electric shocked by Electrified Bus and Train? Even on rainy days.

Answer 1

Because the bus or train is built so the passengers are insulated from the electricity.

Answer 2

There's something called Gauss's Law that explains that any hollow metal object shields the inside from any electricity on the outside. A bus or train is like a big metal tube, and all electricity hitting it is distributed on the outside.

This is also why stereos and other electronics have metal shells covering their circuits. The shell prevents electrical interference in the same way metal vehicles protect their passengers.