Ad
related to: pictures of railroad signs
Search results
Results from the WOW.Com Content Network
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. The initial use of these signals was merely to indicate the on-time status of trains, rather than to control train movements.
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 ...
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs. Some have special shapes, such as the octagon for the Stop sign, the triangle for the Yield sign, and the crossbuck for railroad crossings.
The signs in themselves varied in design from railroad to railroad. Some were marked with – – o – (two longs, one short, and another long). This sequence is known as Rule 14(l)" Rule # 14(l) – Approaching public crossings at grade, to be prolonged or repeated until crossing is reached unless otherwise provided". [4]
Quoting from the terminology book of the Brotherhood of Railroad Signalmen: A torpedo is a device which is strapped to the top of a rail. When a train drives over the torpedo, it emits a very loud "bang" which can be heard over the noise of the engine, and signals the engineer to stop immediately.
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.
This page is part of Wikipedia's repository of public domain and freely usable images, such as photographs, videos, maps, diagrams, drawings, screenshots, and equations. . Please do not list images which are only usable under the doctrine of fair use, images whose license restricts copying or distribution to non-commercial use only, or otherwise non-free images
Ad
related to: pictures of railroad signs