Posted on Feb 5, 2014

The lighting system of a motor vehicle consists of lighting and signalling devices mounted or integrated to the front, sides, rear, and in some cases the top of the vehicle. The purpose of this system is to provideilluminationfor the driver to operate the vehicle safely after dark, to increase theconspicuityof the vehicle, and to display informati

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on about the vehicle`s presence, position, size, direction of travel, and driver`s intentions regarding direction and speed of travel. Driving lamp" is a term deriving from the early days of night time driving, when it was relatively rare to encounter an opposing vehicle. Only on those occasions when opposing drivers passed each other would the dipped or "passing" beam be used. The full beam was therefore known as thedriving beam. Turn signals are required to blink on and off, or "flash", at a steady rate of between 60 and 120 blinks per minute (Although some operate slower than this). International regulations require that all turn signals activated at the same time (i. e. , all right signals or all left signals) flash in simultaneous phase with one another;North American regulations also require simultaneous operation, but permit side markers wired for side turn signal functionality to flash in opposite-phase. Worldwide regulations stipulate an audiovisualtelltalewhen the turn signals are activated; this usually takes the form of one combined or separate left and right green indicator lights on the vehicle`s instrument cluster, and a cyclical "tick-tock" noise generated electromechanically or electronically. It is also required thataudioand/orvisualwarning be provided to the vehicle operator in the event of a turn signal`s failure to light. This warning is usually provided by a much faster- or slower-than-normal flash...

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