# railway signal

> optical, acoustic or electronic signal providing information about the state of a railway line

**Wikidata**: [Q862562](https://www.wikidata.org/wiki/Q862562)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Railway_signal)  
**Source**: https://4ort.xyz/entity/railway-signal


## References

1. Freebase Data Dumps. 2013
2. Integrated Authority File
3. YSO-Wikidata mapping project
4. KBpedia