A Car Bumper Laser Helps Prevent Rear-End Collisions in Fog
https://www-newz.blogspot.com/2015/02/a-car-bumper-laser-helps-prevent-rear.html
It's one of the most passive forms of weather on the planet, but fog accounts for countless pileups and accidents on roads and highways because drivers simply can't see the cars in front of them. But this simple bumper-mounted laser promises to help remedy that by shining a bright red line on the road, 15 to 20 feet behind your vehicle, giving other drivers advance warning that you're ahead of them.
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