The path going up the hanging bridge won't be obvious. As the road dips, you'll notice that the road ahead is full of deep and muddy ruts. Stop right there, and you'll see a path going up on your left. It's beside a house. Go up on that path and you'll see the beams supporting the hanging bridge. Stop at the start, to make sure no one is crossing from the other end. The hanging bridge is just wide enough for one motorcycle crossing one way.