Between Joliet and Mazonia, trains formerly had a second route available. That route involved the Pequot Subdivision route to the west, via Coal City. But the connection at Pequot was broken in 2008.
Radio Frequency - 161.280 (AAR Channel 78) (UP)
36.7 Jackson St.
37.3 UD Tower (crossing-remote-Metra dispatcher)
38.5 South Joliet
62.6 Mazonia (junction-UP)
72.8 Dwight (NS crossing)
102.3 Chenoa (TP&W crossing)
121.5 North End 2 Tracks
126.0 Bloomington Yard
126.5 BNSF Target (NS crossing)
Joliet to Mazonia via Wilmington: 1 track, Track Warrants in use with automatic block signals. It is possible that CTC has recently been installed over this segment, but this is not been confirmed.
Mazonia to Bloomington: 1 track, CTC in use. Some segments of 2 tracks.
Significant changes are under way in Joliet, as the station is reconfigured. In May 2015, UD Tower was closed, with control transferred to the Metra dispatcher.
South of Joliet, the line is being upgraded for high speed operation, resulting in some changes. Google satellite and Street View images reveal the installation of new signals between Joliet and Mazonia, and a new siding under construction at Braidwood.
Classic Track Diagrams
Track diagram as the line existed around 1975, when sidings existed between Joliet and Mazonia. CTC was installed between Chicago and Joliet around 2000.