In 2009 Google announced it was developing driverless cars which would be available to the public in 2020.  The driverless technology industry is expected to be worth £900 billion globally by 2025.

Google has now patented sensor technology to enable the driverless cars to automatically detect police vehicles and respond by moving out of the way or pulling over.  The sensors can identify red or blue colours and the flashing sequence of the emergency services.  Once detected the sensors trigger an alert so the driverless vehicles can move out of the way or pull over to be questioned.