RJR posted:I have never heard of breaking outside rails to create blocks, and I'm sure you're misreading MTH. It isn't practical because trains will be jumping the gap for long periods of time.
It's a control block to disable a train. The longest train to fit is the length of the track between the switches. A & B. It doesn't matter which side of the circuit that you interrupt. Only one outside rail is active. It's an MTH wiring diagram. See that page in the above post.
That's what they are following.
