Over the last few years, bike-sharing systems have become a cost-effective, environmentally friendly alternatives for public transportation in many cities all over the world. On the one hand, the possibility of renting bicycles for short periods of time has given the users a new alternative for performing their daily commuting trips, a vibrant option of completing touristic loops, and a fast way of traversing a city in a healthy and exciting way. On the other hand, from the perspective of the city, this kind of systems have become a natural platform for reducing traffic and pollution, for promoting healthy habits within its citizens, and overall, for improving the living conditions of the city. In short, with their proven success, bike-sharing systems will continue to shape the landscape many major cities in the years to come.