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30 August 1983 Signs For Communication And Safety In Transportation
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Proceedings Volume 0374, Fibre Optics '83; (1983)
Event: Sira/Fibre Optics '83, 1983, London, United Kingdom
1.0 CURRENT FIBRE OPTIC EQUIPMENT 1.1 Motorway signs - communicating to the motorist Fibre optic technology has been used in motorway changeable message signs since the early 1970s. Although non fibre optic units of the bulb matrix type are also used, fibre optic signs have some considerable advantages, namely: a) The ability to project colour legends and if required multi-colour per legend b) Power consumption is only about half of the equivalent bulb matrix types, typically 70 watts c) Due to the use of tungsten halogen lamps the output is of a much whiter light d) Maintenance is considerably reduced as only one lamp per legend is used and this can easily be replaced via an access panel at the side of the sign case e) Lamp failure detection and stand-by legends f) Legends can be reprogrammed at the factory
© (1983) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P. R. Grosvenor "Signs For Communication And Safety In Transportation", Proc. SPIE 0374, Fibre Optics '83, (30 August 1983);


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