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A level crossing is an intersection where a railway line crosses a road or path, or in rare situations an airport runway, at the same level, 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 fashion. Other names include railway level crossing, railway crossing, railroad crossing, grade crossing, road through railroad, criss-cross, train crossing, and RXR (abbreviated).
A stick shaker is a mechanical device designed to rapidly and noisily vibrate the control yoke of an aircraft, warning the flight crew that an imminent aerodynamic stall has been detected. It is typically present on the majority of large civil jet aircraft, as well as most large military planes.
A dead man's switch is a switch that is designed to be activated or deactivated if the human operator becomes incapacitated, such as through death, loss of consciousness, or being bodily removed from control. Originally applied to switches on a vehicle or machine, it has since come to be used to describe other intangible uses, as in computer software.
Automatic train protection (ATP) is a type of train protection system which continually checks 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 to stop the train.
A ground proximity warning system (GPWS) is a system designed to alert pilots if their aircraft is in immediate danger of flying into the ground or an obstacle. The United States Federal Aviation Administration (FAA) defines GPWS as a type of terrain awareness warning system (TAWS). More advanced systems, introduced in 1996, are known as enhanced ground proximity warning systems (EGPWS), a modern type of TAWS.
The Automatic Warning System (AWS) was introduced in the 1950s in the United Kingdom to provide a train driver with an audible warning and visual reminder that they were approaching a distant signal at caution. Its operation was later extended to give warnings for;
An emergency population warning is a method whereby local, regional, or national authorities can contact members of the public en masse to warn them of an impending emergency. These warnings may be necessary for a number of reasons, including:
Canal Street is an express station on the IND Eighth Avenue Line of the New York City Subway. Located at the intersection of Canal Street, Vestry Street, and Sixth Avenue in Lower Manhattan, it is served by the A and E trains at all times, and the C train at all times except late nights.
An air horn is a pneumatic device designed to create an extremely loud noise for signaling purposes. It usually consists of a source which produces compressed air, which passes into a horn through a reed or diaphragm. The stream of air causes the reed or diaphragm to vibrate, creating sound waves, then the horn amplifies the sound making it louder. Air horns are widely employed as vehicle horns, installed on large buses, semi-trailer trucks, fire trucks, trains, and some ambulances as a warning device, and on ships as a signaling device.
A crocodile is a component of train protection systems used in France and Belgium. It works similarly to the Automatic Warning System (AWS) used in the United Kingdom.
A dead-man's vigilance device is a railroad safety device that operates in the case of incapacitation of the engineer. It is a hybrid between a dead-man's switch and a vigilance control. The main safety failing with the basic dead-man's control system is the possibility of the operating device being permanently held in position, either deliberately or accidentally. The dead-man's vigilance device was developed to detect this condition by requiring that the dead-man's device be released momentarily and re-applied at timed intervals.
A black box is a device, object, or system whose inner workings are unknown; only the "stimuli inputs" and "output reactions" are known characteristics.
A railway detonator is a coin-sized device that is used as a loud warning signal to train drivers. It is placed on the top of the rail, usually secured with two lead straps, one on each side. When the wheel of the train passes over, it explodes, emitting a loud bang. It was invented in 1841 by English inventor Edward Alfred Cowper.
The blind spot monitor or blind-spot monitoring is a vehicle-based sensor device that detects other vehicles located to the driver’s side and rear. Warnings can be visual, audible, vibrating, or tactile.
An earthquake warning system or earthquake early warning system is a system of accelerometers, seismometers, communication, computers, and alarms that is devised for notifying adjoining regions of a substantial earthquake while it is in progress. This is not the same as earthquake prediction, which is currently incapable of producing decisive event warnings.
The Dunmurry train bombing was a premature detonation of a Provisional Irish Republican Army (IRA) incendiary bomb aboard a Ballymena to Belfast passenger train service on 17 January 1980.
The anti-collision device (ACD) is a form of automatic train protection used on Indian Railways.
ISO 14971Medical devices — Application of risk management to medical devices is an ISO standard for the application of risk management to medical devices. The ISO Technical Committee responsible for the maintenance of this standard is ISO TC 210 working with IEC/SC62A through Joint Working Group one (JWG1). This standard is the culmination of the work starting in ISO/IEC Guide 51, and ISO/IEC Guide 63. The latest significant revision was published in 2019. In 2013, a technical report ISO/TR 24971 was published by ISO TC 210 to provide expert guidance on the application of this standard.
Level crossing signals are the electronic warning devices for road vehicles at railroad level crossings.
Autonomous Rail Rapid Transit is a LiDAR guided articulated bus system for urban passenger transport. Developed by CRRC Zhuzhou Institute Co Ltd, it was unveiled in Zhuzhou in Hunan province on 2 June 2017.
References
- ↑ "Train warning system in two months". Thehindu.com. 25 March 2008. Retrieved 12 March 2019.
