London’s streets could become test tracks for Google’s driverless cars.

It would be the first time Google’s autonomous cars have been tested extensively outside of the US.

Deputy mayor for transport Isabel Dedring said: “It’s going to have to work in big cities so why don’t we start trialling it now?”

(Eric Risberg/AP)

Google’s fleet of prototype driverless cars rely on sensors and software to complete journeys.

Their shape is more rounded than normal cars to allow the lasers, radars and cameras to detect objects in all directions. They are powered by electric batteries and have an interior that is “designed for riding, not for driving”.

The project has been ongoing since 2009 and more than 1.4 million miles of autonomous driving have been clocked up.

Trials have been limited to Mountain View, California – where Google is based – and Austin, Texas. But it was recently announced that testing will be carried out in Kirkland, Washington, to allow more examination of how the vehicles perform in wet weather.

One of the biggest challenges for developers is to improve how driverless cars interact with other road users.

A report published by the California Department of Motor Vehicles detailed a collision which occurred after a Google test driver took control of a car “out of an abundance of caution” when a pedestrian began walking across the road.

After the brakes were initiated, another vehicle crashed into the back of the car. The Google driver was taken to hospital with minor back pain.

(John Stillwell/PA)

Speaking at an event in central London to discuss the capital’s future roads policy, Dedring admitted she was “personally a bit sceptical about the technology” and noted that “if you’ve got a traffic jam full of driverless cars, that is not better than a traffic jam full of drivers”.

Earlier this week, the Government announced it will invest £20 million in eight driverless car projects in the UK

Transport Secretary Patrick McLoughlin said the technology would “profoundly change the way we travel within years” by reducing accidents, helping traffic flow and making it easier to travel by car.