In the most traditional of tianguis, public officials will close off a street to vehicle traffic on a specified day so that merchants (called “ambulantes”) can set up their spaces on the sidewalks and/or roadways. Most of the spaces are covered by plastic tarps to protect sellers and vendors from the sun and/or the rain. They often enclose the entire area, giving the market an enclosed feeling. In many rural and smaller towns, there is usually a preferred area, which is usually in the town center, near the church plaza and permanent market.