Railroad Signaling Explained: How A Signal System Works at a Control Point

Another of the Forbidden Videos. This is the first in a series of how different parts of the signal system work and what they do. These videos were shot over the course of about a year and in many different places so bear with me on the scenery changes! Also, this is different than the piece I did on what railroad signals mean but I will link that video here.
This first one will deal with how a Control Point works. Control Points are locations controlled remotely by a dispatcher and are the vital points in keeping trains running safely and efficiently in both directions.
I will not get into the minutia of code descriptions, nomenclatures, circuitry descriptions or circuit plans. Just the basic functions of control and support equipment.
So, join me for a primer on railroad signalling at a control point!

Follow these links to more signal system videos!
what signal mean Part 1 https://youtu.be/LHl7IJ3lEMg
what signals mean Part 2 https://youtu.be/I9y3KBXeJtU
providing on track safety https://youtu.be/V2KJPOfMp4Q
changing an m-23 power switch machine https://youtu.be/DDiib9sueNI
Cameron Crossover CPSP370 35d 05' 59"N 118d 17' 18"W