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Signal standards (North America)
AAR
AAR. Signal Section. Circuit nomenclature, written circuits, and graphical symbols. 1946-10
939.0 KB
AAR. Typical circuits representing current practice for railway signaling. 1971
29.0 MB
Chesapeake & Ohio / Erie / New York, Chicago & St. Louis / Pere Marquette
C&O-Erie-NYC&StL-PM standard signal plans
15.1 MB
New York Central
New York Central AC Relays 1930
2.1 MB
New York Central Battery and Primary Battery Instructions 1950
456.8 KB
New York Central Bond and Gate Mech Instructions 1954-51
133.9 KB
New York Central Semaphore Signal Circuits 1944
403.7 KB
New York Central Standard Signal Plan Book 1960
15.4 MB
New York Central Time Release Instructions 1958
60.0 KB
New York Central Track Circuit Instructions 1958
1.4 MB
Pennsylvania
PRR Standard Signal Material Plans 1920-52
11.5 MB
PRR Standard Signal Material Plans 1940s
4.9 MB
PRR Standard Signal Material Plans and Specifications 1924
8.0 MB
PRR Standard Signal Material Plans and Specifications 1951
14.0 MB
AAR
Chesapeake & Ohio / Erie / New York, Chicago & St. Louis / Pere Marquette
New York Central
Pennsylvania
Maintained by Jon R. Roma. Updated Sunday, May 19, 2019 19:21:59 CDT.
Maintained by Jon R. Roma. Updated Sunday, May 19, 2019 19:21:59 CDT.
