Lines involved are generally identified by historic division (Div.), subdivision (SD), district (Dist.), or branch (Br.). Where a branch is identified with a railroad and not a name, it typically might be an industrial spur or another line with an uncertain identity.
Electric street or interurban railways are identified by "elec.", those railways generally are not covered here except where "steam" railroads are also involved. The more important electric railways in Indiana were Fort Wayne & Wabash Valley Traction (FW&WV), Interstate Public Service (IPS), Terre Haute Indianapolis & Eastern Traction (THI&E), Union Traction (UT), Winona Railroad.
Some of the more obscure railroads and lines, are described at the bottom of this page.
Several larger cities had multiple interlocking towers. Because of historic inconsistencies in naming of interlockings and other factors, the locations are not always certain.
Abbott CMSP&P Sullivan Br./NYC Terre Haute-Evansville Line Air Line PRR Panhandle/MON Alida B&O Chicago Div./MON Michigan City Br. Anderson UT (elec.)/CI/NYC Marion Dist. Anderson (west) PRR Anderson Belt/NYC Delco (Anderson) PRR Richmond Br./NYC Ohio Div./CI CI Crossing (Anderson) NYC Ohio Div./CI Avilla PRR GR&I Line/B&O Chicago Div. Bluffton FW&WV (elec.)/NKP Cloverleaf Dist. Bolivar Erie/NYC Marion Dist. Brazil PRR St. Louis Div./C&EI Indiana Line Burnett NYC Illinois Div./C&EI Brazil SD WB Tower (Butler) NYC Toledo Div./WAB Calumet (East Chicago) IHB Indiana Harbor Line/B&OCT/EJ&E Br. Carbon NYC Illinois Div./CI Carmel UT (elec.)/MON Indianapolis Br. Cayuga C&EI/NKP Cloverleaf Dist. Cedar FW&WV (elec.)/PRR Butler Br. Clarks Hill NKP Cloverleaf Dist./NYC Indiana Div. Clarke Jct. PRR/B&OCT Clark Jct. B&O Clay City MON I&L Br./NYC Terre Haute-Evansville Line Clymers WAB/PRR Indianapolis Div./FW&WV (elec.) Coal Bluff NYC Illinois Div./C&EI Indiana Line Cochran B&O St. Louis Div. Colfax NYC Indiana Div./PRR Crawfordsville Br. Vandale (Columbia City) PRR Fort Wayne Div./PRR Butler Br. Cottage Grove B&O Indianapolis SD/C&O Miami SD Ames (Crawfordsville) NYC Peoria & Eastern Line/MON/PRR Crawfordsville Br. Crocker WAB Gary Dist./EJ&E Porter Line DA Tower (Decatur) Erie/NKP Cloverleaf Dist./PRR GR&I Line De Long Erie/PRR South Bend Br. Delphi WAB/MON Indianapolis Br. Dewey (Terre Haute) CMSP&P Terre Haute Div./C&EI Dillon WAB Gary Dist./NKP Indianapolis Div. Dundee NKP LE&W Main/UT (elec.) Dunreith PRR Columbus Div./NKP New Castle Div.-Rushville Br. Dyer MON/EJ&E/NYC Joliet Br. East Chicago (5 interlockings) several railroads Fairmount PRR Muncie Br./NYC Marion Dist. Fair Oaks MON/C&EI Indiana Line Junction (Fort Wayne) PRR Fort Wayne Div./NKP New Castle Dist./NYC Fort Wayne Br. Fowlerton C&O Miami SD/PRR Muncie Br. Frankfort THI&E (elec.)/MON Indianapolis Br. Gibson IHB CX Tower (Goshen) NYC Toledo Div./NYC Marion Dist. Grand Crossing (South Bend) GTW/NYC Kankakee Br./South Bend Br./NJI&I Grasselli IHB Indiana Harbor Line/EJ&E Whiting Line Greencastle NYC Illinois Div./MON Greensburg NYC Indiana Div./NYC Michigan Br. Gridley (Anderson) NYC Ohio Div./PRR Richmond Br./CI Griffith EJ&E/Erie/NYC Joliet Br./GTW/C&O Wabash SD Hamlet PRR Fort Wayne Div./NYC Kankakee Br. HY Tower (Hammond) Erie/C&O Wabash SD Hammond MON/IHB Hohman Avenue (Hammond) IHB/MON/Erie/NKP Hammond MON//C&O Wabash SD CA Tower (Hammond) Erie/NKP Handy NYC Danville Line/NKP LE&W Main Hanna PRR Fort Wayne Div./C&O La Crosse SD Hartsdale PRR Panhandle/EJ&E/NYC Joliet Br. Hays NYC Danville Line/GTW Highland NYC Danville Line/Erie/C&O Wabash SD Hillsdale C&EI/B&O Decatur SD Bart (Hobart) EJ&E Porter Line/PRR Fort Wayne Div. Hobart EJ&E Porter Line/NKP Hoover PRR Butler Br./C&O Wabash SD Hugo (Fort Wayne) WAB/NKP New Castle Dist. Huntington Erie/WAB Indiana Harbor NYC Western Div./B&OCT/IHB Indiana Harbor Line Indiana Harbor PRR Fort Wayne Div./IHB Indiana Harbor Line Indianapolis IU/NYC Ohio Div. Brightwood (Belt Jct.) (Indianapolis) NYC Ohio Div./IU IU Tower (Indianapolis) IU DX Tower (Indianapolis) NYC Ohio Div./IU Massachusetts Ave. (Indianapolis) NYC Ohio Div./NKP Indianapolis Div./MON Indianapolis Br. BX Tower (Indianapolis) NYC Illinois Div./IU Woods (Indianapolis) PRR Indianapolis Div./IU IJ Tower (Indianapolis) NYC Indiana Div./B&O Decatur SD/NYC Peoria & Eastern Line/IU Ivanhoe EJ&E/NYC Porter SD Jackson (Clinton) C&EI Big Four Bridge (Jeffersonville) NYC Louisville Line/IPS (elec.) Jeffersonville PRR Indianapolis Div./B&O Louisville SD/NYC Louisville Line X Tower (Boyd) B&O Louisville SD/PRR Indianapolis Div. Kendallville NYC Toledo Div./PRR GR&I Line Kentland PRR Effner Br./NYC Danville Line Kersey C&WV/NYC Kankakee Br. Kewanna PRR South Bend Br./C&O Wabash SD Kingsland Erie/FW&WV (elec.) Kingsland Erie/NKP New Castle Dist. Kouts PRR Panhandle/Erie Knox NKP/NYC Kankakee Br. La Crosse PRR Panhandle/MON Michigan City Br./C&O La Crosse SD/C&EI La Crosse Branch QN Tower (La Crosse) C&O Wabash SD/PRR Panhandle/MON Michigan City Br./C&O La Crosse SD Lafayette Jct. NKP LE&W Main/WAB/MON Lagro FW&WV (elec.)/WAB industrial Lakeville PRR South Bend Br./WAB Gary Dist. La Otto PRR GR&I Line/PRR Butler Br. La Paz Jct. PRR South Bend Br./B&O Chicago Div. WR Tower (La Porte) NYC Western Div./NKP Indianapolis Div. JD Tower (La Porte) NYC Western Div./C&O La Crosse SD Lawrenceburg B&O St. Louis Div./NYC Aurora Br. Dearborn (Lawrenceburg) NYC Aurora Br./B&O St. Louis Div. Limedale (Greencastle) PRR St. Louis Div./MON Liverpool PRR Fort Wayne Div./NYC Joliet Br. Van (Logansport) PRR Panhandle Losantville C&O Miami SD/NYC Springfield Br. Lydick NYC Western Div./NYC Br. Magee WAB Gary Dist./C&O La Crosse SD Marion NYC Marion Dist./UT (elec.) Maynard PRR Panhandle/GTW GT Crossing (Maynard) MON/GTW McCool EJ&E Porter Line/B&O Chicago Div. McKeen (Terre Haute) CMSP&P/C&EI Michigan City Drawbridge NYC Michigan Div. Michigan City NYC Michigan Div./MON Michigan City Br. Round House (Michigan City) MON Michigan City Br./C&O Grand Rapids SD Midland MON I&L Br./CMSP&P Terre Haute Div. Milan B&O St. Louis Div. Milford Jct. NYC Marion Dist./B&O Chicago Div./Winona (elec.) Miller NYC Western Div. Old Line/B&O Chicago Div. Montpelier NKP New Castle Dist./UT (elec.) Morocco NYC Danville Line/C&EI Indiana Line Muncie NKP New Castle Dist./UT (elec.) Muncie NKP LE&W Main/NYC Ohio Div. Vance (Muncie) NYC Ohio Div./NKP LE&W Main/C&O Miami SD/Muncie Belt Drew (Muncie) C&O Miami SD/PRR Muncie Br. NE Tower (New Haven/Fort Wayne) NKP/WAB New Paris WAB Gary Dist./NYC Marion Dist./Winona (elec.) Newton (Bolivar) Erie/PRR Butler Br. North Judson Erie/C&O Wabash SD/PRR Panhandle/NYC Kankakee Br. QN Tower (North Liberty) NYC Kankakee Br./WAB Gary Dist. Olivers (South Bend) GTW/NYC St. Joseph Br. Osborn IHB Indiana Harbor Line/NKP Otis NYC Western Div./MON Michigan City Br. Otter Creek Jct. (Terre Haute) C&EI/PRR Crawfordsville Br. Oxford C&EI Indiana Line/NKP LE&W Main Peru C&O Wabash SD/NKP Indianapolis Div. Pine B&O/PM Pine NYC/PM Plymouth PRR Fort Wayne Div./NKP Indianapolis Div. PO Tower (Porter) NYC Western Div./NYC Michigan Div./C&O Grand Rapids SD Preston (Terre Haute) PRR Crawfordsville Br./NYC Illinois Div./CMSP&P Terre Haute Div. Ridgeville PRR Logansport Div./PRR GR&I Line RS Tower (Rochester) Erie/NKP Indianapolis Div. Rosedale PRR Crawfordsville Br./C&EI Indiana Line St. Joe B&O Chicago Div./WAB St. John MON/NYC Danville Line Schneider NYC Danville Line/NYC Kankakee Br. Sheff NYC Danville Line/NYC Indiana Div. Shelby MON/NYC Kankakee Br. Shelbyville NYC Indiana Div./PRR Shelbyville Br. Sloan NYC Danville Line/IC Rantoul Dist. South Bend NYC Western Div./GTW South Bend NYC Western Div./NYC Kankakee Br. South Whitley PRR Butler Br./NKP Beehunter (Sponsler) CMSP&P Terre Haute Div./PRR Vincennes Br. Spriggsboro (Valparaiso) GTW/PRR Fort Wayne Div./NKP Spring Hill (Terre Haute) CMSP&P Terre Haute Div./NYC Terre Haute-Evansville Line Steubenville WAB Gary Dist./NYC Fort Wayne Br. Stewart NYC Danville Line/C&EI Judyville SD Swanington NYC Indiana Div./C&EI Indiana Line Templeton NYC Indiana Div./NKP LE&W Main Haley (Terre Haute) C&EI/NYC Illinois Div. Tolleston NYC Porter SD/PRR Fort Wayne Div. Van Loon EJ&E/NKP Veedersburg NYC Peoria & Eastern Line/NKP Cloverleaf Dist. Veedersburg NKP Cloverleaf Dist./C&EI Indiana Line Walkerton B&O Chicago Div./NKP Indianapolis Div./NYC Kankakee Br. Wanatah PRR Fort Wayne Div./MON Michigan City Br. Warsaw PRR Fort Wayne Div./NYC Marion Dist. Waterloo NYC Toledo Div./NYC Fort Wayne Br. Wellsboro B&O Chicago Div./GTW/C&O La Crosse SD Westfield MON Indianapolis Br./CI MS Tower (Whiting) NYC Western Div./B&OCT Whiting PRR Fort Wayne Div./B&OCT Wilders Erie/MON Michigan City Br. Willow Creek NYC Porter SD/B&O Chicago Div./WAB Gary Dist. Winchester NYC Ohio Div./PRR GR&I Line Wolcottville WAB Gary Dist./PRR GR&I Line Wolf Lake PRR Br./IHB Br.
Some of the more obscure railroads and lines, not covered in the basic pages covering the main lines in the area.
C&WV Chicago & Wabash Valley Railroad
Main Line Kersey-McCoysburg