Question: The other day I came across a railroad crossing sign with the word “EXEMPT” placed on it. ... an “X,” and the letters “RR” painted on the pavement in front of the crossing.

Warning signs, pavement markings, gates and flashing red lights are positioned at most railroad crossings. Pavement markings include a stop line, an “X,” and the letters “RR” painted on ...

The Railroad Safety Improvement Act of 2008 mandated that all railroad companies install ENS signs at every crossing in the U.S. by 2017, including those that are temporarily or permanently closed.