text: One growing trend in some cities in South America is "car-free day."  Source 3 describes how "cars have been banned with only buses and taxis permitted." The objective of this day is to enchorage the usage of public transportation.  This day was "a good opportunity to take away stress and lower air pollution" according to one businessman by the name of Carlos Arturo Plaza.  He is right.  Cars are an added stress to a busy day.  While driving there is a constant fear of being involved in an accident, getting lost, popping a tire, or having your car break down.  There is also the nuisance of heavy stop-and-go traffic, bad drivers, and uncooperative lights.  When the amount of cars on the road is reduced there are less bad drivers, less traffic jams, and less stress.  That also means that safety is improved so there are less accidents.