Quote:Engine Bell:
If a train is equipped with an engine bell, it must be sounded:
1. When the engine is about to move.
2. When running through tunnels.
3. While approaching and passing public highway crossings at grade.
4. When approaching locations where Roadway Workers may be at work on tracks, bridges, and other points.
5. When passing a train standing on an adjacent track.
6. In an emergency. In cases where a momentary stop and start, forward and backward movement is part of a switching operation that does not involve movement over a public highway crossing at grade, the engine bell need not be sounded, unless Roadway Workers are known to be in the area.