by truck6018
justalurker66 wrote: If the "W" and "W MX" signs were reminders to whistle for crossings they could be considered an insult ... but they are a visual cue to the engineer of where they are on the railroad and how close the next crossing is. Every rules qualified engineer (is there any other kind?) knows to whistle for crossings. The dumbing down would be if the train blew its own whistle.To go one better. If there is a stop and warn issued for a crossing it will give a place for the engineer to start slowing down.