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[quote user="243129"]LZB and PTC are 'aids'. They are there to assist you not 'run' the train. They can and will fail. That is where proper training comes in.[/quote] I've heard you, repeating it again and again doesn't make it more right. I was asked how DB handles such situations and I tried to answer. The problem is that there were so many human errors by American railroad personell that the PTC system ws deemed necessary. On the other hand the best training doesn't prevent human error completely. DB needed a new system because of higher speeds. For slower speeds they have PZB. To harmonize the different European systems ETCS is developed. Regards, Volker
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