Caltrain electrification another Denver A line disaster waiting to happen ?

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

Hopefully, the contractor will choose a different equipment supplier. Also, the specifications may required equipment with some history of success.

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.

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?