text: In Bogota, Columbia, there is now a car-free day where millions of Columbians hiked, biked, skated, or took buses to work leaving the streets eerily devoid of traffic jams. This has been the third year straight where cars have been banned with only buses and taxis permitted for the Day Without Cars. Businessman Carlos Arturo Plaza says, "It's a good opportunity to take away stress and lower air pollution." Parks and sports centers have bloomed throughout the city. Uneven, pitted sidewalks have been replaced by smooth sidewalks. Rush-hour restrictions have dramatically cut traffic, and new restaurants and upscale shopping districts have cropped up.