Millions of residents of Bogota, Colombia’s capital city, hiked, biked, skated, or used buses and taxis Thursday, Feb. 7, during a “day without cars,” according to the Associated Press. Occasional rain showers didn’t prevent people from participating, said Bogota Mayor Antanus Mockus, who was biking around the city with an orange helmet and vest. It was the third straight year cars have been banned for one day in this capital of 7 million. For the first time, two other Colombian cities, Cali and Valledupar, joined the event, which is aimed at promoting alternative transportation and cutting down smog. The day without cars is part of an improvement campaign that began in Bogota in the mid-1990s.