You are better by placing a million invisible signals, in both directions, such as BNSF50's Invisible Signal, Signal Thingy ... etc ... as not each and every stretch of track and yard track has an actual signal, as most tracks are "dark" unsignaled
Not even the PRR could justify a million billion trillion miles of wiring cables ... so they employed kerosene lanterns and an army of thousands of switch lamp maintainer workmen
