Chicago & North Western

C&NW. 7255. Automatic protection signals between Q Jct., MO and Leavenworth, KS. 1968-12-11   257.5 KB
C&NW. 7256. Leavenworth interlocking, KS. 1968-12-10   307.3 KB
C&NW. CTC district. West Chicago to Nelson, IL. 1951-03-01   4.0 MB
C&NW. Pole head diagrams. 1960-03-01   269.3 KB
C&NW. SD 35.2. Dog chart. Deval, IL. 1975-09-23   8.4 MB
C&NW. SD 35.4. Diagram of track and signals. Deval, IL. 1975-09-23   3.1 MB
C&NW. SD 35.31. Tower wiring. Deval, IL. 1999-03-01   10.2 MB
C&NW. SD 35.32. Tower wiring. Remote control of Tower “NY”. Deval, IL. 1956-04-25   24.8 MB
C&NW. SD 35.33. Interlocking circuits. Deval, IL. 1985-09-25   30.5 MB
C&NW. SD 35.34. Interlocking circuits. Deval, IL. 1985-09-25   30.6 MB
C&NW. SD 35.35. Interlocking circuits. Deval, IL. 1984-01-06   26.4 MB
C&NW. SD 35.36. Interlocking circuits. Deval, IL. 1975-10-23   6.6 MB
C&NW. SD 35.37. Interlocking circuits. Deval, IL. 1967-11-08   11.4 MB
C&NW. SD 35.38. Straight line circuits. Deval, IL. 1996-07-30   14.8 MB
C&NW. SD 35.41. Manipulation chart. Deval, IL (sheet 1 of 2). 1975-09-23   5.4 MB
C&NW. SD 35.42. Manipulation chart. Deval, IL (sheet 2 of 2). 1975-09-23   5.5 MB
C&NW. SD 35.381. Detail straight line circuits. Deval, IL. 1975-04-23   19.1 MB
C&NW. SD 36. Interlocking plan. Wells Street Terminal, Chicago, IL. 1908-06 [B&W]   692.5 KB
C&NW. SD 36. Interlocking plan. Wells Street Terminal, Chicago, IL. 1908-06 [color]   11.1 MB
C&NW. SD 117. Interlocking circuits. Marshalltown, IA. 1959-04-02   33.5 MB
C&NW. SD 123. Interlocking plan. Nelson, IL. 1942-08-14   10.5 MB
C&NW. SD 191.001. Interlocking plan. Lake Street, Chicago, IL. 1950-11-08   21.5 MB
C&NW. SD 191. Interlocking plan. Lake Street, Chicago, IL. [B&W; undated]   566.3 KB
C&NW. SD 191. Interlocking plan. Lake Street, Chicago, IL. [color; undated]   2.7 MB
C&NW. SD 304.1. Locking sheet. Deval “NY”, IL. 1930-09-23   1.0 MB
C&NW. SD 304.2. Dog chart. Deval “NY”, IL. 1973-04-10   2.0 MB
C&NW. SD 304.4. Diagram of track and signals. Deval “NY”, IL. 1972-02-22   1.9 MB
C&NW. SD 304.32. Straight line circuits. Deval “NY”, IL. 1985-07-20   18.2 MB
C&NW. SD 304. Interlocking plan. Deval “NY”, IL. 1978-01-03   4.4 MB
C&NW. SD 1854. Harvard Sub signal profile. 1997-09-10 [REVISION LOG]   449.2 KB
C&NW. Typical circuits   15.9 MB

Illinois Central

IC. Engr. of Bridges drawing 25429. Standard cantilever signal bridge over one track. 1930-06-16   2.4 MB
IC. SD 5. Track plan. Kensington, IL. 1982-04-06. [partial]   1.3 MB
IC. SD 5C. Circuits. Kensington, IL. 1981-04-23   21.2 MB
IC. SD 5C. Circuits. Kensington, IL. 1982-04-06   23.6 MB
IC. SD 5D. Manipulation chart. Kensington, IL. 1982-04-06   9.5 MB
IC. SD 5G. Cable plan. Kensington, IL. 1981-04-23   6.4 MB
IC. SD 5N. Cross bonding of rail return circuit. Kensington, IL. 1981-04-23   1.3 MB
IC. SD 11. Control machine panel. Kankakee Jct., IL. 1980-06-24   8.2 MB
IC. SD 12. CTC control machine. Gilman-Otto, IL. 1978-07-31   13.0 MB
IC. SD 14. Interlocking track plan, Tolono, IL. 1984-04-28   9.3 MB
IC. SD 14C. All-relay interlocking circuit plan. Tolono, IL. 1970-03-10   23.0 MB
IC. SD 14D. Control machine panel, Tolono, IL. 1984-04-28   7.1 MB
IC. SD 17. Interlocking track and signal plan. Champaign, IL. 1924-05-01   3.0 MB
IC. SD 17. Interlocking track and signal plan. Champaign, IL. 1963-08-12   6.5 MB
IC. SD 17A. Locking sheet. Champaign, IL. 1961-02-27   11.1 MB
IC. SD 17B. Dog chart. Champaign, IL. 1961-02-27   20.6 MB
IC. SD 17B. Dog chart. Champaign, IL. 1961-02-27 [SINGLE PAGE]   31.3 MB
IC. SD 17C. Complete signal circuits. Champaign, IL. 1946-10-23   15.3 MB
IC. SD 18. Track and signal plan. Tolono, IL. Marked for management approval. 1949-01-02   15.7 MB
IC. SD 19. Interlocking track plan. Tuscola, IL. 1971-06-21   3.3 MB
IC. SD 19A. Locking sheet. Tuscola, IL. 1971-06-21   1.4 MB
IC. SD 19B. Dog chart. Tuscola, IL. 1971-06-21   3.6 MB
IC. SD 19C. Circuits. Tuscola, IL. 1971-06-21   7.2 MB
IC. SD 20. Interlocking track plan. Arcola, IL. 1969-08-05   2.7 MB
IC. SD 20C. Interlocking circuit plan. Arcola, IL. 1969-08-05   18.0 MB
IC. SD 23. Interlocking track plan, Effingham, IL. 1953-04-08 [MARKUP]   4.0 MB
IC. SD 36. Track and signal plan. Gibson City, IL. Marked for management approval. 1958-01-14   14.8 MB
IC. SD 37. Interlocking track plan. East Cabin, IL. 1979-04-12   6.6 MB
IC. SD 37C. Circuits. East Cabin, IL. 1979-04-12 [PARTIAL]   35.1 MB
IC. SD 38. Track and signal plan. Farmer City, IL. Marked for management approval. 1923-07-18   5.0 MB
IC. SD 42. Track and signal plan. Gibson City, IL. 1964-07-21   6.4 MB
IC. SD 42A. Locking sheet. Gibson City, IL. 1964-07-21   2.9 MB
IC. SD 42B. Dog chart. Gibson City, IL. 1964-07-21   6.1 MB
IC. SD 42C. Circuits. Gibson City, IL. 1984-02-20   15.4 MB
IC. SD 42D. Model board track diagram and manipulation. Gibson City, IL. 1959-04-29   2.6 MB
IC. SD 48. Interlocking track plan, Avenue, IL. 1974-07-16   2.1 MB
IC. SD 48A. Locking sheet. Avenue, IL. 1979-02-01   13.2 MB
IC. SD 48D. Manipulation chart. Avenue, IL. 1979-02-01   5.2 MB
IC. SD 87. Track and signal plan. Kenney, IL. Marked for management approval. 1944-04-10   10.6 MB
IC. SD 87. Track and signal plan. Kenney, IL. Marked for management approval. 1950-06-22   10.4 MB
IC. SD 89. Interlocking track and signal plan. Starnes, IL. 1972-03-21   12.4 MB
IC. SD 89. Track and signal plan. Starnes, IL. Marked for management approval. 1942-06-23   16.6 MB
IC. SD 89. Track and signal plan. Starnes, IL. Marked for management approval. 1945-03-29   7.1 MB
IC. SD 90A. Locking sheet. Avenue, IL. 1948-04-07   2.8 MB
IC. SD 90E. Leadout plan. Avenue, IL. 1956-03-09   1.3 MB
IC. SD 91. Interlocking track plan. Cimic, IL. Marked for management approval. 1957-09-25   5.9 MB
IC. SD 91. Interlocking track plan. Cimic, IL. Marked for management approval. 1958-10-03   6.5 MB
IC. SD 98. Copy of Wabash plan A-12-1 dated 1958-12-08 for IC management approval. Lodge, IL. 1959-04-30   806.3 KB
IC. SD 107, 107A, 107B. Track and signal plan, locking sheet, dog chart. Elmhurst, IL. 1934-02-02   5.0 MB
IC. SD 176. Track and signal plan. Rockport, KY   2.5 MB
IC. SD 176A. Locking sheet. Rockport, KY. 1934-11-20   568.4 KB
IC. SD 176B. Dog chart. Rockport, KY. 1934-11-20   964.2 KB
IC. SD 176C. Complete interlocking circuits. Rockport, KY. 1934-11-20   11.0 MB
IC. SD 202D. Track and signal diagram. Peotone, IL. 1922-10-25   4.7 MB
IC. SD 203D. Track and signal diagram. Manteno, IL. 1922-08-30   7.4 MB
IC. SD 204D. Track and signal diagram. Tucker, IL. 1922-08-31   3.4 MB
IC. SD 1009C. Champaign-Mattoon, IL. sheet 7. MP 130.5-131. 1971-07-01   1.0 MB
IC. SD 1017+1017C. Track plan and circuits near Gibson City, IL. 1973-08-16   18.3 MB
IC. SD 1043. Track plan for automatic signals. Kankakee-Gilman, IL. 1924-09-22   4.7 MB
IC. Temporary track plan with switch shanties. Monee, IL [UNDATED; ca. 1920s]   801.8 KB
ICG. Signal aspect sequence chart. 1985-07-01   447.8 KB
ICG. Signal aspect sequence chart. 1985-07-01. [SINGLE PAGE]   435.9 KB

New York Central

CCC&StL. IN-2023-Xc1. Highway crossing signals. Fowler, IN. 1964-03-27   11.0 MB
CCC&StL. INM-1326-IL. Signal plan for gauntlet. Marion, IN. 1949-04-05   968.7 KB
NYC&HR. Track and signal plan. Block Station A, Syracuse, NY. 1906-03-12   1.0 MB
NYC. ILH-2070-IL. Signal plan. Litchfield, IL. Marked with proposed changes. 1956-10-19   5.4 MB
NYC. ILH-2070-IL. Signal plan. Litchfield, IL. Marked with proposed changes. 1958-02-05   2.6 MB
NYC. K4218. Signal indications. Elkhart, IN. 1971-01-17   3.7 MB
NYC. PE-1415-IL. Signal plan. P&E crossing IC, Farmer City, IL. 1951-04-05   1.1 MB
NYC. PE-1428-Ac. Eastward approach signal circuits. Signal 13D and switch X142, Farmer City, IL 1946-09-04   967.2 KB
NYC. S4265. Signal indications. Elkhart to South Bend, IN. [undated]   1.6 MB
NYC. S-500-11. Westward signal indications. Porter, IN. 1966-10-31   920.1 KB
NYC. S-500-12. Eastward signal indications. Porter, IN. 1966-10-31   1.1 MB
NYC. S-C1208-Ac. Automatic signals D-511 and D-512, West Toledo, OH. 1950-03-20   380.6 KB
NYC. S-C1907-12B. Temporary “SA” dwarf signals. CP 190, Belt Jct., OH. 1968-01-04   1.6 MB
NYC. S-C1907-Ind. Indications. CP 190, Belt Jct., OH. 1968-01-04   1.3 MB
NYC. S-C2916-Ac. Automatic interlocking. Lostant, IL [construction set]. 1966-10-03   7.3 MB
NYC. S-C7226. Color light signal circuits; approach locking with approach home signal control. 1932-03-05   1.1 MB
NYC. S-C7233. Color light train order signal circuits; combination train order and home signal. 1933-04-07   2.2 MB
NYC. S-C 533YS. Switching signal circuits. Englewood, IL. 1964-04-01   1.3 MB
NYC. S-J2313T-2. Signal indications. Bridge 2 to Clark Ave., Cleveland, OH. 1954-02-23   3.2 MB
NYC. S-K130-2. Signal indications. Signal Station OD, Ashtabula, OH. 1953-04-14   2.4 MB
NYC. S-K130-2. Signal indications. Signal Station OD, Ashtabula, OH. 1958-01-15   3.3 MB
NYC. S-K522-T. Single line plans. Park Manor, IL to Chicago, IL. 1964-03-10   551.1 KB
NYC. S-K522-T. Single line plans. Park Manor, IL to Chicago, IL. 1964-03-10. [SINGLE SHEET]   529.1 KB
NYC. S-L2824-Im. Manipulation chart. Shelby, OH. 1926-04-19   201.4 KB
NYC. Southern Region. Interlocking diagrams. 1968   119.8 MB

New York, New Haven & Hartford

NYNH&H. Interlocking diagrams. [incomplete; various dates]   68.7 MB

Northern Pacific

Northern Pacific. 208.2. Ground plan, locking, and dog sheet. Coon Creek Jct., MN. 1935-06-10   1.9 MB
Northern Pacific. 310.3. Dog chart and locking sheet. Staples, MN. 1919-01-22   2.7 MB
Northern Pacific. 37241-1914. APB typical circuits – same battery for line and motor. Page 2. 1920-08-20   3.1 MB
Northern Pacific. 37241-1914. APB typical circuits – same battery for line and motor. Page 2. 1920-08-20 [SINGLE PAGE]   2.9 MB
Northern Pacific. B-401. Circuits. Dilworth to Jamestown. Sheet 12. 1940-01-23   1.4 MB
Northern Pacific. B-401. Circuits. Dilworth to Jamestown. Sheet 12. 1940-01-23 [SINGLE PAGE]   1.4 MB
Northern Pacific. B-1104. Circuit plan. Easton-Lester, WA. MP 49 to MP 55. Page 5. 1940-01-10   3.8 MB
Northern Pacific. B-1104. Circuit plan. Easton-Lester, WA. MP 49 to MP 55. Page 5. 1940-01-10 [SINGLE PAGE]   3.7 MB
Northern Pacific. B-1303. Track and location plan. Tacoma to Tenino via Point Defiance line. Sheet 2. 1939-09-22   3.5 MB
Northern Pacific. B-1303. Track and location plan. Tacoma to Tenino via Point Defiance line. Sheet 2. 1939-09-22 [SINGLE SHEET]   3.5 MB
Northern Pacific. BA-6-0. On single track – automatic signals affected by movement of trains between stations having lap sidings. 1912-12-31   712.1 KB
Northern Pacific. BB-1-0. Typical circuits. Automatic block signals – double track. 1927-01-10   3.1 MB
Northern Pacific. BB-1-0. Typical circuits. Automatic block signals – double track. 1927-01-10 [SINGLE PAGE]   3.1 MB
Northern Pacific. BB-5-2. Typical circuits. Double track, low voltage line relays. 1927-01-10   3.2 MB
Northern Pacific. BB-5-2. Typical circuits. Double track, low voltage line relays. 1927-01-10 [SINGLE PAGE]   3.2 MB
Northern Pacific. BB-7. Typical circuits. Color light signals. Double track. 1929-03-12   2.7 MB
Northern Pacific. BB-7. Typical circuits. Color light signals. Double track. 1929-03-12 [SINGLE PAGE]   2.6 MB
Northern Pacific. BB-9. Typical circuits. Color light signals. Single track – overlap control. 1939-04-04   3.0 MB
Northern Pacific. BB-9. Typical circuits. Color light signals. Single track – overlap control. 1939-04-04 [SINGLE PAGE]   2.8 MB
Northern Pacific. BB-10. Typical circuits. Single track – overlap control. AC track circuits. 1939-12-30   2.3 MB
Northern Pacific. BB-10. Typical circuits. Single track – overlap control. AC track circuits. 1939-12-30 [SINGLE PAGE]   2.2 MB
Northern Pacific. BB-11. Typical circuits. Single track – overlap control. DC track circuits. 1939-05-04   2.2 MB
Northern Pacific. BB-11. Typical circuits. Single track – overlap control. DC track circuits. 1939-05-04 [SINGLE PAGE]   2.0 MB
Northern Pacific. CE-4-5. 4’ x 4’ steel house, relay and battery shelter. 1931-02-05   1.1 MB
Northern Pacific. EGZ-7-1. Lining and shelving for two-door instrument case per plan EGZ-8. 1929-08-01   837.0 KB
Northern Pacific. Profile, track plan, and circuits. Steele, ND. 1940-01-29   2.2 MB