Safety instrumented system — A Safety Instrumented System (SIS) is a form of process control usually implemented in industrial processes, such as those of a factory or an oil refinery. The SIS performs specified functions to achieve or maintain a safe state of the process… … Wikipedia
Westlock Interlocking — Westlock is Westinghouse Rail Systems replacement for its SSI product.Westlock builds on many of the features that made SSI popular in the United Kingdom. This includes re use of SSI s programming language and its external hardware. In addition… … Wikipedia
Solid State Interlocking — (SSI) is the brand name of the first generation processor based interlocking developed in the 1980s by British Rail, GEC General Signal and Westinghouse Signals Ltd in the UK. Interlocking hardware SSI utilises a 2 out of 3 architecture, whereby… … Wikipedia
Computer-based interlocking — is the general term for a railway signalling interlocking implemented with computers rather than the older technologies such as relays or mechanics. General CBIs are mostly implemented in two parts; a section that implements the safety and… … Wikipedia
Positive train control — (PTC) is a system of monitoring and controlling train movements to provide increased safety.OverviewThe main concept in PTC is that the train receives information about its location and where it is allowed to safely travel. Equipment on board the … Wikipedia
CityRail — An S Set train enters Museum Station … Wikipedia
Moorgate tube crash — Date and time 28 February 1975 08:46 Location Moorgate Rail line Northern Line (Highbury Branch) (London Underground) … Wikipedia
Scottish Railway Preservation Society — The Scottish Railway Preservation Society is a charity, whose principal objective is the preservation and advancement of railway heritage in Scotland. The Society was formed in 1961, and it has been actively collecting and displaying railway… … Wikipedia
Interlock (engineering) — Interlocking is a method of preventing undesired states in a state machine, which in a general sense can include any electrical, electronic, or mechanical device or system.In most applications an interlock is a device used to help prevent a… … Wikipedia
Railway signalling — Not to be confused with Railway signal. A gantry of British semaphore signals seen from the cab of a steam locomotive Railway signalling is a system used to control railway traffic safely, essentially to prevent trains from colliding. Being… … Wikipedia
New York City Subway — Top: A number 4 train made up of R142 … Wikipedia