Driverless cars rollout will be 'gradual and progressive'

Three quarters of all cars on the road will be driverless by 2035, according to a report from US-based consultants Navigant Research, writes Brian Byrne.

That could be more than 95m cars operating largely on their own, a big move up from the 8,000 autonomous cars suggested to be operating by 2020.

It will be a gradual and progressive transition, according to Navigant's David Alexander. Although early elements of the idea are already in place, like self-parking, automatic brakes and collision avoidance, the rollout to more autonomy will depend on solving legal and insurance liability issues than the availability of the technologies themselves.