Was in Hatta Sunday, seen about 5-6 of these parked around the hill park so asked one of the drivers about this sighting, it’s for moving equipment and stuff around (I think he said mainly in that area, I could be worng) and since there are quite a few unpaved roads in that region it allows easy access to such places - hilux driver
How much of this is true or is the actual reason of having hilux taxis, I have no idea.