Other article that gives an advantage in limiting the use of cars is, Car-free day is spinning into a big hit in Bogota by Andrew Selsky says, "BOGOTA, Colombia-In a program that's set to spread to other countries, millions of Colombians hiked, biked, skated or took buses to work during a car-free day yesterday, leaving the streets of this capital city eerily devoid of traffic jams." As you can see, people in colombia are doing many things that does not involve the use of a car.