Look at a photo of any 20th century railroad line and you will see line side poles of some kind. These have been used to carry the wires that have done many things for the railroad including telegraph, telephone, signal control, remote turnout control, etc. As the railroads adopted newer technology many of these overhead wires were no longer needed. Often the poles have remained.
After working with a few different types of poles I over the years on various layouts I have decided to used the Atlas 2801 Telephone pole sets as line side poles on this layout.
Recently I found a stash
of Atlas poles at a train show which I ended up paying $1.25 per box.
The boxes were quite beat up but the poles were just fine.