Rio Grande - Switch Stand Targets

After a quick search here yielded nothing, I decided to post a new topic.

While searching through pics of mine, I studied the different colors of targets currently on the C&TS. This is what I have deduced...

If 2 targets, and the colors are:

Red and Green - in yards, main line ONLY, Red shows for switch thrown to siding, Green shows in favor of the main line



Green and yellow - in yards, switches NOT on the main line, Green for current path, yellow for side track...



If one target:

Anywhere on ROW, Red showing means switch thrown for siding (or diverging track)...



Question 1, Is this correct for common C&TS practices, and was this adopted from D&RGW, or was the Rio Grande Different?

Question 2, I have seen single targets in yards, and dual targets out of yards, was there a common practice, or was it more pot luck...

Question 3, Were there different setups for Junctions, and other scenarios?

Casey