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A dim-dip device operates the dipped beam headlights at between 10% and 20% of normal low-beam intensity. Running lights permitted as an alternative to dim-dip were required to emit at least 200 candela straight ahead, and no more than 800 candela in any direction.
Headlight flashing might have come into more common use as a means of attempting driver-to-driver communication by the mid-1970s, [3] when cars began to come with headlight beam selectors located on the steering column—typically activated by pulling the turn signal stalk—rather than the previous foot-operated pushbutton switches.
Formal research found, at best, a small improvement in visual acuity with yellow rather than white headlights, [55] [56] and French automaker Peugeot estimated that white headlamps produce 20 to 30 percent more light—though without explaining why this estimate was larger than the 15% to 18% value measured in formal research—and wanted ...
Later models would use electronic height sensors and motors so adjustment could be achieved with the engine off. This system allowed the suspension to achieve an unusually soft ride quality. [7] Since then, millions of fairly inexpensive Citroën cars have been equipped with self-levelling as an unobtrusive, but integral design feature.
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Height adjustable suspension is a feature of certain automobile suspension systems that allow the motorist to vary the ride height or ground clearance. This can be done for various reasons including giving better ground clearance over rough terrain, a lower ground clearance to improve performance and fuel economy at high speed, [1] or for stylistic reasons.
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