Taxi Driver Waiting For Clients

We're spending a few days in Caraíva, a very colorful, small island about 50 km south of where we live. The trip is long and shaky, more than 30 of these 50 km are precarious dirt roads (and the residents of Caraíva don't want that to change, as it naturally limits the number of visitors). The taxis powered by mules is the first thing you come across when you reach the island. 
The sign on the tree informs that any motorized vehicles are prohibited on the island.