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A variable-(also changeable-, [1] electronic-, or dynamic-) message sign or message board, often abbreviated VMS, VMB, CMS, or DMS, and in the UK known as a matrix sign, [2] is an electronic traffic sign often used on roadways to give travelers information about special events.
In the signage industry, neon signs are electric signs lighted by long luminous gas-discharge tubes that contain rarefied neon or other gases. They are the most common use for neon lighting , [ 1 ] which was first demonstrated in a modern form in December 1910 by Georges Claude at the Paris Motor Show . [ 2 ]
Neon lights were named for neon, a noble gas which gives off a popular orange light, but other gases and chemicals called phosphors are used to produce other colors, such as hydrogen (purple-red), helium (yellow or pink), carbon dioxide (white), and mercury (blue). Neon tubes can be fabricated in curving artistic shapes, to form letters or ...
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This is a list of hillside letters (also known as mountain monograms), large geoglyphs found primarily in the Western United States. [1] [2] [3] There are about 600 in total, but the status of many of these symbols are uncertain, due to vagueness in sources. The states with the most hillside letters are: Montana: 86 monograms; California: 83 ...
Standard radar speed sign with block letters. Pictured with solar panel.. A radar speed sign or speed feedback sign is an interactive sign comprising a speed-measuring device (e.g. a loop detector or radar) and a message sign generally constructed of a series of LEDs, which displays vehicle speed of approaching motorists. [1]
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