I can really understand your frustration on PTC. PTC is a problem of ROI for operators. The incentive is apparently not so great, so it will take decades. Also

I can really understand your frustration on PTC. PTC is a problem of ROI for operators. The incentive is apparently not so great, so it will take decades. Also, and this is frequent in rail, any complicated solution that will leverage the existing infrastructure will be explored, further entangling the situation. In more controlled economies, the state has enforced for long the technology to be used. [1] Some may say it is a case where free market cannot be trusted to take the correct decisions. It is a societal debate, no longer an engineering topic. [2] [1] Not too bad: https://en.m.wikipedia.org/wiki/Positive_train_control https://en.m.wikipedia.org/wiki/Positive_train_control [2] https://en.m.wikipedia.org/wiki/Rail_Safety_Improvement_Act_of_2008 https://en.m.wikipedia.org/wiki/Rail_Safety_Improvement_Act_...