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The first signals employed on an American railroad were a system of flags used on the Newcastle and Frenchtown Turnpike and Rail Road in the 1830s. The railroad then developed a more effective system consisting of wooden balls, painted red, white or black, and hoisted up or down a pole on a rope-and-pulley system.
A system combining aspects of the colour and position systems was developed on the Baltimore and Ohio Railroad (B&O) in 1920 and was patented by L.F. Loree and F.P. Patenall. It is similar to the position light system with the central light removed and the resulting pairs of lights colored in correspondence to the angle they make: green for the ...
The right-of-way (ROW) is the property owned or controlled by a railroad for purposes of transportation. [212] [213] Road engine (US) The locomotive closest to the train during a double-heading operation Roll-by or rollby (US) Visual inspection of railroad equipment while it is in motion [214] [215] Rolling Bomb
A British Upper Quadrant semaphore signal. In the days of the first British railways, "policemen" were employed by every railway company. Their jobs were many and varied, but one of their key roles was the giving of hand signals to inform engine drivers as to the state of the line ahead. [3]
In 1992, the American Association of Railroad Superintendents (AARS) convened a special committee, which suggested to its board of directors, executive council, and membership that “the AARS sponsor a full conference on the standardization of railroad operating rules, practices, and procedures, and that this conference be conducted on the ...
Upper-quadrant signal on the Santa Fe Railroad, 1943. The vertical position indicates a "clear" aspect. Lower-quadrant stop signals at St. Erth in 2007. British semaphores come in lower-quadrant and upper-quadrant forms. In a lower-quadrant signal, the arm pivots downwards for the less restrictive (known as "off") indication.
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1911 Chart of the Standard American Morse Characters. American Morse Code — also known as Railroad Morse—is the latter-day name for the original version of the Morse Code developed in the mid-1840s, by Samuel Morse and Alfred Vail for their electric telegraph.
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