I was involved with bidding for telecommunications infrastructure for PTC on a Class 1 railroad about 8 or so years ago.
VSAT terminals operate in Ka- and Ku-band, both of which suffer from "rain fade." Since my other hobby/profession is/was satellite disk installations, I naturally asked what happens when communications are lost to a railroad block.
They said they drop all signals to danger. Essentially, the railroad randomly shuts down during storms.
With this, I'm asking any of you if you know how (or if) the industry has overcome this? Is VSAT only a backup to another terrestrial technology like cable, radio, or mobile phone data?