Blue Line O'Hare Branch Traction Power Improvements GTT - Project will include targeted track repairs to remove existing slow zones on the Congress Branch of the Blue Line. CTA has identified traction power voltage drop issues along the Blue Line. Scope of work will include but not limited to the following elements: New infill substations, infill wayside energy storage systems, infill tie houses, third rail replacement, addition of auxiliary negative rail; work will be performed by an outside contractor. In addition project will aslo provide for the replacement of ties, track fasteners, footwalks, and incidental signal and traction power; this part of work will be performed by CTA Field Forces.