Image below: Set of culverts for hydrology that are inside the fenced road corridor, SP-225, near Brotas, São Paulo. The wildlife fence blocks wildlife access to the structure. If wildlife fencing is tied into the structure, the culverts can also be used by wildlife.
Image below: Culvert for hydrology that is tied into the wildlife fence allowing wildlife to use the culvert. This particular culvert is indeed used by wildlife, especially capybara. Along SP-225 motorway, near Brotas, São Paulo, Brazil.