The Nissan 126X was a concept car from 1970.
It had a wedge shaped design with a forward-tilting cockpit canopy. The slots along the hoods center housed red, yellow, and green lights which lit up in accordance to what the vehicle was doing (accelerating, braking, or constant speed).
The vehicle featured a rear-mounted 3-litre 6 cylinder power plant and 4-wheel drive.
It was displayed at the 1970 Tokyo Motorshow. The original 126X concept still exists and was recently used in a Nissan Design exhibition in Japan.