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D-ATC indicator used on the E233 series trains. The digital ATC system uses the track circuits to detect the presence of a train in the section and then transmits digital data from wayside equipment to the train on the track circuit numbers, the number of clear sections (track circuits) to the next train ahead, and the platform that the train will arrive at.
In the event that maintenance is needed along any section of the track, before a work crew is dispatched or before a work crew is granted authority to proceed, a temporary speed restriction (TSR) is created in the office computer systems. After a series of verifications and procedures, the TSR is presented to the ACSES office system.
Non-revenue tracks (storage tracks, tail tracks, yard tracks) are not equipped with ATC. Green signs with letters reading "START ATC" and "END ATC" mark the beginning and ending respectively of ATC territory. A train services the West Falls Church station from the center track, due to single-tracking west of the station.
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Air traffic control (ATC) is a service provided by ground-based air traffic controllers who direct aircraft on the ground and through a given section of controlled airspace, and can provide advisory services to aircraft in non-controlled airspace. The primary purpose of ATC is to prevent collisions, organize and expedite the flow of traffic in ...
Air traffic controllers are generally individuals who possess superior situational awareness, spatial awareness, and are well organized.Other skills that are essential include a fast processing of numeric computations and mathematics, assertive and firm decision-making skills, the ability to maintain their composure under pressure, and an excellent short-term memory.
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The predecessor of modern electronic traction control systems can be found in high-torque, high-power rear-wheel-drive cars as a limited slip differential.A limited-slip differential is a purely mechanical system that transfers a relatively small amount of power to the non-slipping wheel, while still allowing some wheel spin to occur.