Two years after introduction of 30 km/h speed limit in Lyon, France's third-largest city. "We have reduced the number of accidents by 35 percent, that's enormous," says mayor Grégory Doucet.

The speed limit is not just limited to the city of Lyon, it will soon also apply to 24 municipalities in the surrounding area of ​​the metropolitan area with around 1.4 million people. The average recorded speed is 38 kilometers per hour, and last year 17,000 fines were issued for speeding.