
...a hot dog stand
in a converted RAILROAD dining car.
The Big Bang Theory Season 4, Episode 6

You'd have to drive a RAILROAD spike into
his brain for me to beat him at checkers.
The Big Bang Theory Season 2, Episode 11

...um, I embarked
on a RAILROAD journey of healing...
The Big Bang Theory Season 8, Episode 1

down by the RAILROAD tracks."
Breaking Bad Season 2, Episode 12

...an outdoor museum
featuring 43 RAILROAD engines, cars...
The Big Bang Theory Season 4, Episode 6