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Good points, CShaveRR. I've heard "Poorman's CTC" described as absolute, DS-controlled signals at sidings or interlockings with ABS in between. I believe permissive signals are also common on mountain grades, denoted by a plate on the mast bearing the letter "G". Is that right? Question on those -- is a red signal in that case still "Stop and proceed at restricted speed" or is it simply "Proceed at restricted speed (without stopping)"? Here's another question: Much of B&O's Sandpatch grade is directional ABS on two main tracks. I know permission must be obtained from the DS to run wrong-main, but I believe there is a timetable rule allowing operation on the right-main by signal indication alone. I've never been able to find out the details to this, though . . . Thanks! Scott
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