What doest two cars mean!?

Question

i was crossing the rail railroad tracks today and thier was a small sign about the size of a napkin on a post that said two cars thats it and i have no idea what it means

Answer 1

just guessing here. It could mean there's 2 pair of tracks, so there could be 2 trains to watch for.

Answer 2

could have been the scene of a 2 car fatality.

Answer 3

It means that only two cars should cross the tracks at any given time..........................