Copenhagen now has more bikes than cars - here are the 5 most bike-friendly cities in the world

The city of Strasbourg has over 300 miles of biking routes, according to the Copenhagenize Index. Strasbourg also has a bike-share system called Vélhop that allows for long-term rentals.

Utrecht placed third in the 2013 Copenhagenize Index as well. The city is building the world's largest underground bike park — a $48 million project set to be completed in 2018, according to Dutch News. When completed, the facility will fit 12,500 bikes.

You'll notice that the Netherlands has been sweeping this list. According to Fietsersbond, the Cyclists' Union of Amsterdam, there are 18 million bikes in the country. In the city of Amsterdam, the number of bikes exceed the number of people.

It should come as no surprise that Copenhagen ranks first, especially now that there are more bikes than cars. According to the 2015 Copenhagenize Index, the city continues to invest heavily in its bike infrastructure, especially in bike-only bridges.

Copenhagen is even trying to use bike travel times as the baseline for traffic lights.