Radio Frequency - 161.250 (AAR Channel 76)
----- 74th Street
515.7 81st Street
512.3 Pullman Jct.
511.0 Calumet Yard
510.0 110th Street
507.9 Cummings (drawbridge)
507.3 Torrence
505.9 Burnham (NS crossing/remote-Cummings)
504.7 State Line (CSX/IHB crossing/remote-IHB dispatcher)
503.8 Hammond (IHB crossing/remote-IHB dispatcher)
500.5 Osborn (NS crossing/remote-IHB dispatcher)
497.9 Van Loon (EJ&E crossing)
493.2 South Gary
488.3 Hobart
480.7 Spriggsboro (CN crossing/remote-CN dispatcher)
477.0 Valparaiso
473.9 Nickel
468.0 South Wanatah
463.0 Thomaston (CSX crossing)
451.5 Knox
438.9 Hibbard
431.0 Argos (NS crossing)
424.4 Tippecanoe
420.8 Clemer
419.8 Mentone
415.9 Burket
410.9 Claypool (NS crossing/automatic interlocking)
403.3 Sidney
397.2 South Whitley
389.9 Peabody
386.9 Raber
381.9 Dunfee
377.4 Hadley
372.7 Runnion Ave.
371.6 Fort Wayne
367.2 Four Mile Road
366.3 East Wayne
365.4 N.E. (NS crossing)
74th Street to 81st Street - 1 track, yard rules.
81st Street to Pullman Jct. - 2 tracks, CTC in use, controlled by operator Cummings drawbridge.
Pullman Jct. to 110th Street - 1 main track, CTC in use, controlled by operator Cummings drawbridge.
110th Street to Burnham - 2 tracks, CTC in use, controlled by operator Cummings drawbridge.
Burnham to Osborn - 2 tracks, signalled for normal right hand operation, controlled by operator Cummings drawbridge.
Osborn to Van Loon - 2 tracks, signalled for normal right hand operation, controlled by dispatcher.
Van Loon to Hadley - 1 track, CTC in use, controlled by dispatcher.
Hadley to Runnion Ave. - 2 tracks, CTC in use, controlled by dispatcher.
Runnion Ave. to Four Mile Road - 2 tracks, signalled for normal right hand operation.
Four Mile Road to N.E. - 1 track, CTC in use, controlled by dispatcher.
Information is subject to change, and is based on information from the CORA (Chicago Operating Rules Association) guide dated 2001, along with some observations, and Google satellite imagery.
The following colors are used to indicate types of operation:
BLUE - manual interlocking
RED - centralized traffic control (CTC) or bidirectional signals
GREEN - automatic block signals (single direction, current of traffic)
BLACK - unsignaled
Thin lines across tracks indicate signals. In CTC or bidirectional signal territory, signals usually exist for both directions at all locations, except at interlockings where the signals usually are only in the direction entering the interlocking.

