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Train Protection Systems
A train protection system is a railway technical installation to ensure safe operation in the event of human error. Development Train stops The earliest systems were train stops, as still used by the New York City Subway, the Toronto rapid transit, Toronto subway, the London Underground, the Moscow Subway (only on the older lines) and the Berlin S-Bahn. Beside every Railway signal, signal is a moveable arm. If the signal is red, levers connected to valves on any passing train hit the arm, opening the Air brake (rail), brake line, applying the emergency brake, If the signal shows green, the arm is turned away from the levers and there is no contact. The Great Western Railway in the UK introduced its 'automatic train control#United Kingdom, automatic train control' system in the early years of the 20th century. Each distant signal had before it a ramp between the running rails. If the signal showed green, the ramp was energised with a low voltage current which was passed to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Error
Human error is an action that has been done but that was "not intended by the actor; not desired by a set of rules or an external observer; or that led the task or system outside its acceptable limits".Senders, J.W. and Moray, N.P. (1991) Human Error: Cause, Prediction, and Reduction'. Lawrence Erlbaum Associates, p.25. . Human error has been cited as a primary cause and contributing factor in disasters and accidents in industries as diverse as Nuclear and radiation accidents and incidents, nuclear power (e.g., the Three Mile Island accident), Pilot error, aviation, List of spaceflight-related accidents and incidents, space exploration (e.g., the Space Shuttle Challenger disaster and Space Shuttle Columbia disaster), and Medical error, medicine. Prevention of human error is generally seen as a major contributor to Data integrity, reliability and safety of (complex) systems. Human error is one of the many contributing causes of risk events. Definition Human error refers to somethi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Train Control System
The European Train Control System (ETCS) is a train protection system designed to replace the many incompatible systems used by European railways, and railways outside of Europe. ETCS is the signalling and control component of the European Rail Traffic Management System (ERTMS). ETCS consists of 2 major parts: #trackside equipment #on-board (on train) equipment ETCS can allow all trackside information to be passed to the driver cab, removing the need for trackside signals. This is the foundation for future automatic train operation (ATO). Trackside equipment aims to exchange information with the vehicle for safely supervising train circulation. The information exchanged between track and trains can be either continuous or intermittent according to the ERTMS/ETCS level of application and to the nature of the information itself. The need for a system like ETCS stems from more and longer running trains resulting from economic integration of the European Union (EU) and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automatic Train Protection
Automatic train protection (ATP) is the generic term for train protection systems that continually check that the speed of a train is compatible with the permitted speed allowed by signalling, including automatic stop at certain signal aspects. If it is not, ATP activates an Emergency brake (train), emergency brake to stop the train. See also * Advanced Civil Speed Enforcement System * Anti Collision Device * Automatic Warning System * Automatische treinbeïnvloeding (ATB) * Automatic Train Protection (United Kingdom), British Rail's ATP system * Continuous Automatic Warning System (CAWS) * EBICAB * European Train Control System (ETCS) * Kavach_-_Indian_Railways, Kavach * Positive Train Control (PTC) * Punktförmige Zugbeeinflussung (PZB) * Train Protection & Warning System * Train Warning System (India), Train Warning System * Transmission Voie-Machine (TVM) References {{rail-transport-stub Train protection systems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ATACS
Advanced Train Administration and Communications System (ATACS) is an automatic train control (ATC) system developed by RTRI starting from 1995 and first introduced by JR East on the Senseki Line in 2011. It uses radio communication rather than traditional signals, and works as a moving block system. Technical description Radio transmission Communication between the train and the trackside equipment happens entirely through bidirectional radio communication. Radio base stations are placed at intervals of 2 to 3 km and operates on four different frequency bands, used alternately to prevent inference. Radios operate in the 400 MHz frequency band, with data transmitted using TDMA access method with Reed–Solomon error correction at 9.6 kbps. The radio system are based on proprietary standards with encryption. Ground equipment Ground controller The ground controller, being the main control unit of ground equipment, is responsible for the identification of train ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Train Control System
An Advanced Train Control System (ATCS) is a North American system of railroad equipment designed to ensure safety by monitoring locomotive and train locations, providing analysis and reporting, automating track warrants, detecting blind spot and similar orders. ATCS specifications are published by the Association of American Railroads (AAR), and are designed to document the stated requirements of railway/railroad operational and technical professionals concerning ATCS hardware and software.Association of American Railroads, Washington, DC (2005)"Manual of Standards and Recommended Practices. Section K: Railway Electronics." Principles The basic principle behind ATCS is to provide a cost efficient, safe, modular, train control system with an open architecture. The primary goals of the system are to provide for * compatibility of systems across railroads. This helps to ensure seamless operation. For example, locomotives from one railroad will be able to communicate, via data r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automatic Train Control
Automatic train control (ATC) is a general class of train protection systems for railways that involves a speed control mechanism in response to external inputs. For example, a system could effect an emergency brake application if the driver does not react to a signal at danger. ATC systems tend to integrate various cab signalling technologies and they use more granular deceleration patterns in lieu of the rigid stops encountered with the older automatic train stop (ATS) technology. ATC can also be used with automatic train operation (ATO) and is usually considered to be the safety-critical part of a railway system. There have been numerous different safety systems referred to as "automatic train control" over time. The first experimental apparatus was installed on the Henley branch line in January 1906 by the Great Western Railway, although it would now be referred to as an automatic warning system (AWS) because the driver retained full command of braking. The term is especi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Automatische Treinbeïnvloeding
Automatische TreinBeïnvloeding or ATB ('Automatic train control') is a Dutch train protection system first developed in the 1950s. Its installation was spurred by the Harmelen train disaster of 1962. ATB operates by the train collecting electrical signals from line-side apparatus and will override the driver's controls in the following situations: * a) failure to reduce speed at a caution signal (ATB will slow the train sufficiently to stop at the next signal). * b) failure to observe speed limit (ATB makes an immediate emergency brake application) ATB-EG ATB-EG ''(''ATB Eerste Generatie ''English: ATB First Generation'') is based on the American Pulse code cab signaling, Pulse Code Cab Signaling system. It is installed on all major Dutch rail lines. Technical overview ATB-EG controls 5 speeds: 40 km/h, 60 km/h, 80 km/h, 130 km/h and 140 km/h. Just like Pulse Code Cab Signaling the system works by sending pulses along the AC track circuit. When ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anuncio De Señales Y Frenado Automático
Anuncio de Señales y Frenado Automático (ASFA; "Announcement of Signals and Automatic Braking") is an Automatic train protection, Automatic Train Protection system widely deployed on the Spanish rail network. It consists of a mechanism that stops a train if the driver does not properly heed signals. Operation ASFA makes use of inductive coupling between a transceiver on the rolling stock and a balise (tuned electronic beacon) that oscillates at one of nine preset frequencies when activated by a magnetic field emanating from said transceiver. The balise requires no external power, however, there is a cable for controlling small relays inside the transponder which switch capacitors in/out of the coil circuit and determine which frequency is detected by the passing train. The nine frequencies lie in the 60-100 kHz range (although only five frequencies are used in ASFA) and the wayside balises are mounted between the rails offset from the track centerline to provide directionalit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ALSN
ALSN (автоматическая локомотивная сигнализация непрерывная, in Latin - avtomaticheskaya lokomotivnaya signalizatsiya nepreryvnaya, meaning ''Continuous Automatic Train Signalling'') is a train control system used widely on the main lines of the ex-Soviet states (Russian Federation, Ukraine, Belarus, Latvia, Lithuania, Estonia). It uses modulated pulses inducted into rails similar to the Italian RS4 Codici and American Pulse Code Cab Signaling. On high-speed lines the variant ALS-EN (АЛС-ЕН) is used which takes advantage of a double phase difference modulation of the carrier wave. The name ALSN (АЛСН - автоматическая локомотивная сигнализация непрерывного действия) is composed of ALS, literally "Automatic Locomotive Signalling" (АЛС - автоматическая локомотивная сигнализация) and the variant designation N "Continuous Effect" (� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Civil Speed Enforcement System
Advanced Civil Speed Enforcement System (ACSES) is a positive train control cab signaling system developed by Alstom. The system is designed to prevent train-to-train collisions, protect against overspeed, and protect work crews with temporary speed restrictions. The information about permanent and temporary speed restrictions is transmitted to the train by transponders ( Balises) lying in the track, coded track circuits and digital radio. It was installed beginning in 2000 on all of Amtrak's Northeast Corridor (except MTA territory) between Washington and Boston, and has been fully active since December 2015, a few months after the 2015 Philadelphia train derailment which it would have prevented. General system design ACSES provides railway trains with positive enforcement of "civil" speed restrictions (those based on the physical characteristics of the line). The on-board components keep track of a train's position and continuously calculates a maximum safe braking curve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications-based Train Control
Communications-based train control (CBTC) is a railway signaling system that uses telecommunications between the train and track equipment for traffic management and infrastructure control. CBTC allows a train's position to be known more accurately than with traditional signaling systems. This can make railway traffic management safer and more efficient. Rapid transit systems (and other railway systems) are able to reduce headways while maintaining or even improving safety. A CBTC system is a "continuous, automatic train control system utilizing high-resolution train location determination, independent from track circuits; continuous, high-capacity, bidirectional train-to-wayside data communications; and trainborne and wayside processors capable of implementing automatic train protection (ATP) functions, as well as optional automatic train operation (ATO) and automatic train supervision (ATS) functions," as defined in the IEEE 1474 standard.1474.1–1999 – IEEE Standard fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
