Is the problem with the audiotone overlay systems harmonics from the 60 cycle propulsion system? Can they mot be filtered to a level that the signal system can coexist with?
There's this little thing called infrared...take a page out of model railroading, or the same system they use to determine red light runners...a simple infrared detector,but no, we have to make it as complicated as a nuclear air craft carrier.
Hopefully, the contractor will choose a different equipment supplier. Also, the specifications may required equipment with some history of success.
Caltrain personel getting worried that since contractors are same for signals as Denver that it could be in same trouble as Denver RTD.
http://caltrain-hsr.blogspot.com/2018/12/grade-crossing-trouble-ahead.html
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