Copenhagen has been rated as the most bicycle-friendly city in the world since 2015, with bicycles outnumbering its inhabitants. In 2012 some 36% of all working or studying city-dwellers cycled to work, school, or university. With 1.27 million km covered every working day by Copenhagen's cyclists (including both residents and commuters), and 75% of Copenhageners cycling throughout the year. The city's bicycle paths are extensive and well used, boasting  of cycle lanes not shared with cars or pedestrians, and sometimes have their own signal systems – giving the cyclists a lead of a couple of seconds to accelerate.