Mejor en Bici (Better on Bike) is a local bike organisation that has long been a key advocate of car-free day. It pushed for car-free day to be extended into an entire car-free week for the Colombian city of 7 million. Car-free day typically has a massive impact, with about 600,000 cars being left at home on that day. It is the largest car-free event in the world. Residents of Bogotá lose approximately 22 days per year in traffic and also lost 570 people to traffic fatalities in 2013. This car-free week is a turning point for Bogotá’s residents that it is time to start gaining time back from sitting in traffic, better air quality, and happier and longer lives.