Because cars get tyred but trains do not, with the exception of Rubber-tyred metro systems.
The Ford Siesta Many thanks to for that one.
Take your girl and your dog, and lock them in the back of a car, return in 5 hours, which one do you think will be happy to see you?
Conductor
The teacher says, "Spit out your gum," but a train says, "Chew chew!"
Because its two tyred
Can't catch me - Avicii
They're both under DC.