Unfortunately, since those roads are basically at sea level (the one from butterfly farm may actually be an inch or two below), it is difficult to keep the roads dry during the rainy season. Big busses and vans put a lot of wear and tear on the roads and it is difficult to scrape/grade the roads every day or two. Paving, I have read, would lead to runoff problems that could damage the environment. We just look at it like Mother Nature's speed bumps and add a few minutes to our expected travel time when we go to Orient.