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Scenes of the B&O Railroad. Decorative title page for Ele Bowen, Rambles in the Path of the Steam-Horse, 1855. When construction began on the B&O in the 1820s, railroad engineering was in its infancy. Unsure exactly which materials would suffice, the B&O erred on the side of sturdiness and built many of its early structures of granite.
Freight train at Derwood interlocking heading east towards Washington, D.C. Through mergers, the line became part of the CSX system in 1987. CSX organized its Metropolitan Subdivision as a combination of the original B&O Met Branch plus a section of the B&O original main line northwest of Point of Rocks, which had opened in 1834.
In the background are CSX freight trains. On the left is Mexico Tower, a closed interlocking tower. The Cumberland Terminal Subdivision is a railroad line owned and operated by CSX Transportation in the Cumberland, Maryland area. The line centers on the Cumberland rail yard and is a junction with three other subdivisions.
An interlocking system is designed so that it is impossible to display a signal to proceed unless the route to be used is proven safe. Interlocking is a safety measure designed to prevent signals and points/switches from being changed in an improper sequence. For example, interlocking would prevent a signal from being changed to indicate a ...
B&O built its first interlocking tower building at the site in 1894, and rebuilt the tower in 1912 and again in 1917. CSX closed this tower in 1992, and demolished it in 1994 after a fire. [8] The ferry operation was discontinued in 1906 when the B&O obtained trackage rights from PRR.
A full B&O-style CPL signal on CSX at Carroll interlocking, Baltimore, Maryland A CPL dwarf signal on CSX at Bailey interlocking, Baltimore. The color position light (CPL) signal was developed by Frank Patenal, superintendent of signaling of the Baltimore and Ohio (B&O) railroad, circa 1918. He also developed a proprietary signal aspect system ...
It was named after Oden Bowie, the railroad's proprietor, who served as the governor of Maryland from 1869 to 1872. [4] In the 1880s, the development of the interlocking system allowed a single worker in an interlocking tower to control multiple railroad switches by means of electrical controls. The original Bowie Tower, which controlled the ...
These two mechanisms for control would be formalized by American railroad companies in a set of procedures called train order operation, which was later partly automated through use of Automatic Block Signals (ABS). The starting point of each system was the railroad timetable that would form the advanced routing plan for train movements. Trains ...