From OpenStreetMap Wiki
|Warning cross on railway level crossing.|
|Used on these elements|
|Status: In use|
|Tools for this tag|
The tag crossing:saltire=* is used to tell if there is a warining cross on a railway level crossing.
- railway=level_crossing obligatory
- crossing:saltire=yes/no is there a warning cross?
- crossing:saltire=yes default value, no need to map this
- crossing:saltire=no there is no warining cross