Dr Zarkoff Wrote:
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> Correct. Perhaps the OP meant "signaled
> territories which don't have wayside signals",
> situations which date back to the 1930s and
> earlier. PTC is, after all, a royalty-encumbered
> signal system which has been designed to
> (hopefully) wash the cat and put out the dog.


In my example, I mean something like an industrial lead or a non CTC siding. My understanding of PTC (which may be wrong) is that trains can only pass where there are wayside antennas to talk to the PTC system, IE a CTC controlled siding. In CTC territory, there are uncontrolled sidings and industrial tracks which a local,etc could clear the main for opposing movements. Can that still happen with PTC, or does a meet have to occur at a PTC equipped siding?