Rear Fog Laser
In the EU, it’s standard for all cars to equip what’s called a “rear fog light“. They’re available on a small number of cars in the US, and what it is is a single rear light, brighter than a brake light – on the left on the Continent, and on the right in the UK – which alerts cars driving behind you that you’re there when visibility is poor.
Audi has taken the idea one step further, designing a laser rear fog light that illuminates an area on the ground behind the vehicle, indicating for motorists behind it a safe following distance. With the slow introduction of LED headlights and DRL, this is a pretty neat innovation.