Lighting: LED Astray?

It is dark and wet, no streetlights. The windshield wipers are going. The road junction you are approaching has manifold merging traffic streams, and you need to change lanes for your exit. You check for vehicles right, left, ahead, behind. Some are already braking, and their rear light intensity is changing. Your memory map of the vehicles in front is in place, and with a final sweeping glance, you make your move. But suddenly, the bus has jumped position, and the truck seems to straddle two

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