I have it set up like that and have used it for 3 years or so. But there are two issues
- first the overhead sensors are picky about color of the trains.
- More importantly- I have Fastrack on a roadbed with a wider than standard center so one or the other sensors does not center exactly over the rails.
So, I want to trip the signal when the train is farther away, AND I hope the IR detecting method will be more foolproof.