A GM car that 'drives itself' will be on sale by the end of the decade, according to the US motor giant.
The so-called 'semi-autonomous' car - probably a high-end Caddy - will feature radio-based car-to-car communications integrated into a suite of safety tech, like cruise control radar, blind-spot sensors and reversing cameras to automatically over-ride brakes and steering in an emergency.
"We can sense all these things now and if you take the driver out of the emergency situation, then accidents can be avoided and there will be fewer deaths and injuries," says Nady Boules, GM's chief engineer for electronic engineering.
The key tech for the 'semi autonomous' car is the car-to-car radio, which will beam signals about accident avoidance to other similarly-equipped cars to prevent multiple pile-ups.
Even if a handful of cars in a traffic queue are 'semi-autonomous' that will be enough to improve road safety, says Boules, because they will slow non-equipped cars following in a traffic queue.