# S21

> railway service of the RER Fribourg

**Wikidata**: [Q110305258](https://www.wikidata.org/wiki/Q110305258)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/S21_(RER_Fribourg))  
**Source**: https://4ort.xyz/entity/s21-q110305258


## References

1. [Source](https://www.tpf.ch/Portals/0/Images/Fichiers//Horaires%20et%20plans//Plans%20du%20r%C3%A9seau/PLAN_FER_2023_A1.pdf)