Another issue is at grade road crossings. There are limits as to how long you can close a crossing preventing road traffic from going through. The longer the tr

Another issue is at grade road crossings. There are limits as to how long you can close a crossing preventing road traffic from going through. The longer the train the longer the crossing is closed. I think the vast majority of railroads have at grade road crossings [exceptions might be high speed rail.] Does anyone know?