An "exempt" sign means that bus and truck drivers, who are usually required to stop at railroad crossings, may proceed ...

In the United States, a blue and white sign is mandatory for every railroad crossing. “That is very important. It tells the individual if there is an unsafe situation at a railroad crossing.

Question: The other day I came across a railroad crossing sign with the word “EXEMPT” placed on it. What is that all about?

Question: The other day I came across a railroad crossing sign with the word “EXEMPT” placed on it. What is that all about?