This project will eliminate the most congested rail chokepoint in the Chicago Terminal, Belt Junction, where 30 Metra and 90 freight trains per day cross each other’s paths. The rail-rail flyover at 75th Street will eliminate conflict between 30 SouthWest Service Metra trains and 35 freight trains operating on the Western Avenue Corridor (CSX). The construction of an additional main line for Metra operation and the rail-rail flyover connection will reduce congestion and freight conflicts and will connect Metra’s SouthWest Service with the existing Rock Island District tracks, increasing capacity and improving reliability.

This project will allow SouthWest Service trains access to LaSalle Street Station instead of Union Station, which increases capacity for the SouthWest Service while also freeing capacity at Union Station for increased Amtrak service and proposed high-speed rail. This project also is expected to improve Amtrak Cardinal service performance by eliminating freight conflicts in the vicinity of 80th Street. The road-rail grade crossing separation at 71st Street will reduce neighborhood traffic delay and improve safety.