In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15
Well, Sheldon was going on and on
about time zones and RAILROAD schedules,
The Big Bang Theory Season 9, Episode 16
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
...a hot dog stand
in a converted RAILROAD dining car.
The Big Bang Theory Season 4, Episode 6