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A Magnetic flagman wigwag signal in use in southern Oregon, June 2007. Wigwag is a nickname for a type of railroad grade crossing signal once common in North America, referring to its pendulum -like motion that signaled a train's approach. The device is generally credited to Albert Hunt, a mechanical engineer at Southern California 's Pacific ...
Bill Riehl (President) Website. www.arema.org. The American Railway Engineering and Maintenance-of-Way Association (AREMA) is a North American railway industry group. It publishes recommended practices for the design, construction and maintenance of railway infrastructure, which are used in the United States and Canada.
A level crossing is an intersection where a railway line crosses a road, path, or (in rare situations) airport runway, at the same level, [ 1 ] as opposed to the railway line crossing over or under using an overpass or tunnel. The term also applies when a light rail line with separate right-of-way or reserved track crosses a road in the same ...
The concept of grade separation includes all transport modes, such as a simple pedestrian bridge over rail tracks. In civil engineering (more specifically highway engineering), grade separation is a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on ...
Level crossing signals are electronic warning devices for road vehicles at railroad level crossings. Level crossings can be operated in various ways. In some countries such as the UK, the warning devices are more often than not activated by remote control, I.e. an operator pressing buttons. However, the majority of countries have automated systems.
The costs of installing lights and gates, he said, has gotten out of hand. “The railroads increased the cost to upgrade a crossing to $150,000, then $200,000, then $250,000, then to $300,000 and ...
Operation Lifesaver. Operation Lifesaver is a 501 (c) (3) educational organization in the United States dedicated to promoting safety at railroad grade crossings and railroad rights-of-way. Operation Lifesaver is the largest rail safety education organization in the United States. [1] It was founded by the Union Pacific Railroad in the early 1970s.
Ruling gradient. The term ruling grade is usually used as a synonym for "steepest climb" between two points on a railroad. More simply, the steepest grade to be climbed dictates how powerful the motive power (or how light the train) must be in order for the run to be made without assistance. Even if 99% of the line could be run with a low ...