Kalmbach Publishing Co.
This is a special reprint of articles from the June and July 1957 issues of Trains magazine.
Title / Description
2 or More Trains on 1 Track
Covers the timetable and train order operation, the manual block system, automatic block signaling, multiple-aspect signaling, automatic train control, and cab signaling. Lots of diagrams explaining the text.
Signals... Where Tracks Cross
Covers mechanical interlocking, electric locking, electromechanical interlocking, power and relay interlocking, automatic interlocking, route interlocking, interlocking, signal aspects, regulating opposing movements, controlled manual block, overlap and absolute permissive block, train operation by signal indication, centralized traffic control, and control centers. Includes lots of diagrams.