Secret Code Behind A-113!

Have you ever seen this?

Ok...... So what about this?

Note the number....

Again.... Note the train number.....

The license plate. 

So far these were Disney Movies.....

This is the Simpsons. NOT a Disney Movie, but still using A-113. 

Caption, on the screen shows you "room A-113."

Not Disney, American Dad. Plate number A-113.

Now are you even slightly curious as to why?

Hint number one:

And then the entire answer:

Now you know the secret behind A-113! Please share with your friends, because learning something new everyday, is a good thing!