A pair of SD70Ms power UP Train MWTNP 11 under the classic UP Signal Bridge at West Topeka after a crew change. The days are numbered for the immaculate code line and signal bridge here, and it will be sad to see these original Union Pacific relics go!
Photos showing the railroad pole lines. The pole line used four basic electrical circuits - telegraph, telephone, signaling, and power. Modern technologies of fiber optics, microwave, radio, satellite, and computers have been replacing the pole lines.