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The first traffic lights are installed, outside the Palace of Westminster in London. Resembling railway signals, they use semaphore arms and are illuminated at night by red and green gas lamps.
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Traffic light
Signaling device to control competing flows of traffic
Traffic lights, traffic signals, or stoplights – also known as robots in South Africa, Zambia, and Namibia – are signaling devices positioned at road intersections, pedestrian crossings, and other locations in order to control the flow of traffic.Source: Wikipedia (CC BY-SA)
Palace of Westminster
Meeting place of the Parliament of the United Kingdom
The Palace of Westminster is the meeting place of the Parliament of the United Kingdom and is located in London, England. It is commonly called the Houses of Parliament after the House of Commons and the House of Lords, the two legislative chambers which occupy the building. The…Source: Wikipedia (CC BY-SA)
Railway signal
Visual signal device for railway engineers
A railway signal is a visual display device that conveys instructions or provides warning of instructions regarding the driver's authority to proceed. The driver interprets the signal's indication and acts accordingly. Typically, a signal might inform the driver of the speed at…Source: Wikipedia (CC BY-SA)
Railway semaphore signal
Form of fixed railway signal
Railway semaphore signals are an early form of fixed railway signals. The semaphore system involves signals that display their different indications to train drivers by changing the angle of inclination of a pivoted 'arm'. Semaphore signals were patented in the early 1840s by…Source: Wikipedia (CC BY-SA)
Gas lighting
Types of lighting device which burn gas fuel
Gas lighting is the production of artificial light from combustion of a fuel gas such as methane, propane, butane, acetylene, ethylene, hydrogen, carbon monoxide, or coal gas. The light is produced either directly by the flame, generally by using special mixes of illuminating…Source: Wikipedia (CC BY-SA)