> These are not controlled locations, non signaled. I believe they have time locks. The specific example I think of was the old BN Local that would run to Home Valley, get in the clear on the hand throw switches, and inevitably have to wait there for an eastboung to follow to head back to Bingen and Wishram.

Railroad jargon refers to getting off the main track for a train as "clearing up". While you can physically clear up in a siding or any track connected to the main track(s), sidings are specifically reserved for meets between two opposing trains (industry tracks simply aren't practical for long trains making a meet, although I have used one for part of my train). While a local or switch engine can clear a train in an industry track, the conditions for doing so are dependent on the type of authority on the main track (TO/schedules, TWC, CTC, etc.) and what signal appliances are required to be attached to the hand-throw switches involved. If a local or switch engine clears up in a siding, it must have permission to do so from the DS. The presences of Rule 93 limits (the yard limits rule) tends to complicate the situation, and there are no yard limits within CTC.