There's no need; it's already included in A17.
Maybe overthink your choise.
Playing on the rainforest mod, my Builder build roads through the jungle, and once he is want to break, he move straight through the jungle instead to use his own builld path.
Maybe not an issue about pathfinding, but caravan rarely exit the map through the selected direction you select at the option. I set south, because the base is at the south, south is a road closeby, and the pawns move 1 day to the north through the jungle to exit.