The telecoms firm is trialling the 5G-powered vehicles in London and they believe they can cut emissions by cutting 10 per cent from the time drivers spend in traffic jams by managing the cars.
O2's UK boss, Mark Evans, said:
"We're moving at pace with our 5G rollout, already live in six UK cities, rising to 20 by the end of the year.
"5G offers critical support to the UK's digital economy, supporting jobs and growth."
Trials will take place in Greenwich and the Olympic Park in Stratford.
Technology officer, Brendan O'Reilly, added:
"We know that by powering the transport sector we can make a real difference to consumers by reducing traffic congestion, making journeys safer and faster."