South Korea’s roads have an unenviable reputation - as the most dangerous in the developed world, for both drivers and pedestrians.

The country has the most road deaths in the developed world - more than 5,500 a year.

To make the roads safer, South Korean police have launched what they say is a world first: they have put a remotely operated drone above a motorway to monitor bad drivers.

Al Jazeera's Harry Fawcett reports from Seoul.