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

In 1944, the Pacific Railroad
built number 6131,
The Big Bang Theory Season 7, Episode 15

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

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

There are dozens of RAILROAD crossings
you have to blow the whistle for.
The Big Bang Theory Season 10, Episode 15