What city is famous for having more bicycles on the road than cars?

Copenhagen

Explanation:

There's not a lot of cities in the world that can brag about their bicycling culture and having bikes outnumbering the cars by far. Copenhagen, the capital of Denmark, has the privilege to be named the first city in the world that has more bicycles on its roads than cars. In fact, there's more bicycles in the city than inhabitants. The estimates are that around 50% of the population is using bicycles everyday, be it for getting to work and back, to go shopping, for recreation, or any other reason. The city has an excellent infrastructure for bicycling, and on top of that the people have high ecological sense, resulting in Copenhagen to proudly bear the name First Bike City in the world.