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[quote user="jeffhergert"]Since the reversed switch shunts the signal system causing a restrictive indication, you're going to be go through the entire signal block at restricted speed.[/quote] I hope I understand correctly. If the signal system detects the switch in normal position there is no restrictive signal indication. [quote user="jeffhergert"]In the future if they can ever work out "rolling blocks" and remove the signal system as we know it, then they would have to tie in every switch.[/quote] I fear therefore someone has to re-design PTC to a stand-alone system. That was the critizism by a number of independent industry experts that railroads had given away the rolling block advantage by letting the signal department develop PTC. The advantage wasn't unknown as the FRA had it in their cost-benefit analysis. Regards, Volker
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