what's it mean?

[arkham railroader]

my girlfriend went to the b&o museum the other day and saw this sign, she and i were wondering what it means. i know what it means to my "in the gutter" mind, but wanted to know what it really is.

 

[jbaakko]

There are certain pieces of rolling stock that cannot be Humped, or rolled over a Hump in a yard. You know the auto sorting yards, where the cars are rolled over a hill and then sorted as they roll freely.

 

[arkham railroader]

ah yes, i do know about the humps in certain yards to let the gravity roll the cars back. didn't think about that though. thanks for the clarification.

 

[BB Michigan]

Basically any kind of car that will bottom out such as center depressed flat cars and double stack cars.

 

[Railphotog]

I beleive also because the car and/or load might not be able to take the heavy coupling at the bottom of the hump.