Correct answer
Two visible at the front and two visible at the rear.
Two visible at the front, white, and two at the rear, red. They indicate overall width and complement position lights to draw attention to vehicle bulk, positioned as high as permitted by the vehicle and its regulations. They are required above 2.10 metres and optional between 1.80 and 2.10 metres. Rear ones are optional on chassis-cabs, an exception excluded here.
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Two visible at the front and two visible at the rear.
Two visible at the front and one visible at the rear.
One visible at the front and one visible at the rear.
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