Colombia has many "puentes" or three day weekends, there's hardly a month without one, often two or even three (a bone of contention for companies that would like increased production). Fairs are planned for some of them as is the case here. I don't know how long they've had the parade with the "campesino" theme but it is certainly fun.
There is a department of transportation but a lot of the rules are ignored in the pueblos. The entrance to the village arrives at a "t" and the town fathers decided that entering vehicles should only be allowed to turn right at the "t" so that became the rule. It was obeyed for a few months but now everybody turns left if they want to.