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The yellow trap occurs when the timing of the amber lights (also known as "yellow" lights in the USA) is asymmetric for two-way traffic on a single road: when a vehicle is waiting to turn across oncoming traffic and receives an amber light from the traffic signal, the driver may assume that oncoming traffic also has received an amber light and ...
Blinkenlights on the NSA's FROSTBURG supercomputer from the 1990s Typical LED pattern of a Thinking Machines CM-5. The Connection Machine, a 65 536-processor parallel computer designed in the mid-1980s, was a black cube with one side covered with a grid of red blinkenlights; the sales demo had them evolving Conway's Game of Life patterns.
This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Signaling device to control competing flows of traffic This article is about lights used for signalling. For other uses, see Traffic light (disambiguation). "Stoplight" redirects here. For other uses, see Stoplight (disambiguation). An LED 50- watt traffic light in Portsmouth, United ...
A permanently signed detour route (also known as an emergency detour route or emergency diversion route) is a type of route which is used temporarily during special circumstances.
The basic signal consists of flashing red lights, a crossbuck and an alarm (either a bell, a speaker that mimics a bell sound or an electronic siren), attached to a mast. At most crossings, the signals will activate about 30 seconds before the train arrives but there are sensors measuring speed so that the crossing knows when to activate; so ...
The most universal type of light is the headlight, which is included on the front of locomotives, and frequently on the rear as well. [2] Other types of lights include classification lights, which indicate train direction and status, and ditch lights, which are a pair of lights positioned towards the bottom of a train to illuminate the tracks.
A Belisha beacon atop its striped pole. This example also features a spot lamp to illuminate the crossing at night. A Belisha beacon (/ b ə ˈ l iː ʃ ə /) is a yellow-coloured globe lamp atop a tall black and white striped pole, marking pedestrian crossings of roads in the United Kingdom, [1] Ireland, and other countries historically influenced by Britain, such as Hong Kong, Cyprus, Malta ...
In building wiring, multiway switching is the interconnection of two or more electrical switches to control an electrical load from more than one location.A common application is in lighting, where it allows the control of lamps from multiple locations, for example in a hallway, stairwell, or large room.