The EGNSS MATE project, led by Swiss Federal Railways, is experimenting with map-assisted sensor fusion algorithms to include GNSS into the signaling scheme of the European Rail Traffic Management System.
Nice to see Navigation Message Authentication #OSNMA used for this:
> “IABG analyzed the use of new Galileo services OSNMA and HAS within the ERTMS, and tested the performance of the new algorithms against jamming and spoofing attacks, as simulated in the laboratory.”
https://insidegnss.com/esa-funded-project-enables-moving-block-operations-in-european-rail/