I'm gonna be working on the RAILROAD
all the livelong day.
The Big Bang Theory Season 10, Episode 15
There are dozens of RAILROAD crossings
you have to blow the whistle for.
The Big Bang Theory Season 10, Episode 15
Well, Sheldon was going on and on
about time zones and RAILROAD schedules,
The Big Bang Theory Season 9, Episode 16
In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15
...a hot dog stand
in a converted RAILROAD dining car.
The Big Bang Theory Season 4, Episode 6