Driverless cars will trigger gridlock chaos as they roam the roads to avoid parking fees

Driverless cars will cruise around city centres while their owners shop instead of parking to avoid extortionate parking fees, according to new research. The influx of the controversial vehicles meandering around the roads would likely increase congestion and cause huge traffic jams, scientists claim. During this time they will also save petrol by going slow to'kill time' - amplifying the issue. Driverless cars will cruise around city centres while their owners shop instead of parking to avoid extortionate parking fees, according to new research. Adam Millard-Ball, an associate professor of environmental studies at the University of California, Santa Cruz, said: 'Parking prices are what get people out of their cars and on to public transit.