Turkey's Erdogan tests a driverless bus

Speaking at a ceremony after the test ride, Erdogan said the vehicle was part of "initial steps for clean energy."

He added that Turkey would tackle climate change "when the United States" did the same.

Erdogan and officials hopped into the country's first driverless electric bus and watched as the steering wheel turned of its own accord.

Designed by Turkish engineers the vehicle has a range of 300-kilometers (186.4 miles) and it has a capacity of 50 passengers.