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The track circuit remains de-energised until the interrupter is replaced. GK/RT0011 specifies the requirements for the provision of track circuit interrupters. [1] Interrupter drawn as two filled triangles. Assume train has overrun 53 signal and 52A trap points and interrupter shows DBT T.C. on Down Line as blocked (twin red lights).
Automatic block signaling (ABS), spelled automatic block signalling or called track circuit block (TCB [1]) in the UK, is a railroad communications system that consists of a series of signals that divide a railway line into a series of sections, called blocks. The system controls the movement of trains between the blocks using automatic signals.
Signalling block systems enable the safe and efficient operation of railways by preventing collisions between trains. The basic principle is that a track is broken up into a series of sections or "blocks". Only one train may occupy a block at a time, [citation needed] and the blocks are sized to allow a train to stop within them. [1]
A derail or derailer is a device used to prevent fouling (blocking or compromising) of a rail track (or collision with anything present on the track, such as a person, or a train) by unauthorized movements of trains or unattended rolling stock. [1] The device works by derailing the equipment as it rolls over or through it.
Most blocks are "fixed", i.e. they include the section of track between two fixed points. On timetable, train order, and token-based systems, blocks usually start and end at selected stations. On signalling-based systems, blocks start and end at signals. The lengths of blocks are designed to allow trains to operate as frequently as necessary.
The first time T-TRAK builder is advised to use Kato Unitrack exclusively on their first few modules. Track Section Lengths for Modules of Various Lengths. The use of Kato track created an early "informal" standard for the length of track on a module to be 310mm (which is 12.2"). A module of this size is typically referred to as a "single".
The placard is intended to remind engineers that they are bound by a 40 mph (64 km/h) speed restriction, and must approach the interlocking signal prepared to stop, whenever a station stop is made or train speed drops below 10 mph (16 km/h) in the approach block.
A buffer stop, bumper, bumping post, bumper block or stopblock (US), is a device to prevent railway vehicles from going past the end of a physical section of track. The design of the buffer stop is dependent, in part, on the kind of couplings that the railway uses, since the coupling gear is the first part of the vehicle that the buffer stop ...