Another sign seen on our trip was for deslave. When I went looking for a definition of this word, I was first routed to deslizarse which means to slide. Then I was sent to derrubiar, I have never encountered this word before so some digging was required. Derrubiar refers to a river that robs earth from the shore, erosion.
When we saw signs for deslave they were always near a section of road that has collapsed because the foundation has been eroded by water. So deslave would be a washed out section of the road.