From OpenStreetMap Wiki
|Warning bell on a railway level crossing|
|Used on these elements|
|Status: In use|
|Tools for this tag|
The tag crossing:bell=* specifies if there is a warning bell on a railway level crossing.
How to map?
- crossing:barrier=* to indicate the type of barrier if not tagged individually.
- crossing:saltire=yes/no is there a warning cross?
- crossing:light=yes/no if there is a warning light
- crossing:on_demand=yes - on demand activation