Another thing.. if this thing is atonomusly leading a locomotive does it trigger blocks or is it like a speeder and invisible to track circuits.
If its like a speeder it could end up at a interlocking before the train does and it could pass through before a route is lined and end up going a different way then the train.
Why not just install the equipment on the actual locomotives?
Because the whole idea of this thing is to provide a warning to the train(s) behind it. What good would this be if it came across a washout and it was just a few feet ahead of the locomotive?