Driverless cars: Tesla, Google, Nissan and others shift gears

There’s the safety element to consider, as well. While some people find the prospect of handing over control of the steering wheel, brakes and throttle to a computer frightening, the reality is that people often don’t drive well. Computers, on the other hand, never get sleepy, don’t suffer from road rage and can’t drive under the influence of alcohol or drugs. And if they text and drive — which some vehicles already can — they can do it while remaining fully concentrated on the road.
Here are five companies working on bringing self-driving cars to fruition.