Semaphores

Semaphores

Block signals; when "on", the semaphore is presented as follows: Stop: a red rectangular arm with a white vertical stripe extended horizontally with a red light so that it can be seen at night. Caution: a yellow rectangular arm with a black chevron and a fish-tail end with a yellow light so that it can be seen at night. When in the "off" position, the arm is raised. At night or when visibility is poor, a green light is shown.

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Part of Speech: noun
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Industry/Domain: Transportation
Category: Railway
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Related terms

semaphores

Transportation; Railway

Block signals; when "on", the semaphore is presented as follows: Stop: a red rectangular arm with a white vertical stripe extended horizontally with a red light so that it can be ...

semaphore

Computer; Software; Software engineering

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Earth science; Physical oceanography

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Automation; Industrial automation

In programming, a signal that is used to govern access to shared system resources. A semaphore is a flag variable — an indicator — that helps maintain order among processes that ...

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Software; Globalization software service

(1) A mechanism that is used to synchronize one or more jobs. (2) An indicator used to control access to a file. For example, in a multiuser application, a semaphore is a flag ...

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Semiconductors; Digital Signal Processors (DSP)

A classic method for restricting access to shared resources (for example, storage) in a multiprocessing environment. A semaphore is a protected variable (or abstract data type) ...

funiculaire

Transportation; Railway

Un funiculaire est une remontée mécanique équipée de véhicules circulant sur des rails en pente et dont la traction est assurée par un câble.

cable railway

Transportation; Railway

A cable railway is a steeply graded railway that uses a cable or rope to haul trains.

shunter's whistle

Transportation; Railway

the use of a whistle to announce that a train is manoeuvering

platform

Transportation; Railway

Raised structure in stations providing access to the cars or wagons.

platform starting signal

Transportation; Railway

Stop signal located at the end of the platform.

points

Transportation; Railway

Device or junction where the track divides into two or more diverging lines or where two or more lines converge into one track. Points are made up of three parts: the actual point ...

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