The P1 project will raise the existing two-track Metra Rock Island District Line approximately 29 feet to fly over the existing three-track Norfolk Southern alignment. The new structure will be designed to span six tracks, comprised of the three existing NS tracks and three future tracks, which include track for the planned expansion of high-speed rail through the corridor.
IHC Construction and Illinois Constructors Joint Venture was the low bidder on the project and awarded the contract.