Later in the afternoon, I heard a local train in Nueva Italia calling the dispatcher. The had finished their work (presumably on the branch to Apatzingan) and were ready to depart north. After being excited about the approaching train, I was again disappointed to find that it was only a single engine returning to the yard in Uruapan. Here is is seen crossing the bridge.
While returning to the autopista, I was surprised to find a second such arch bridge located about 20KM to the north. Unfortunately, this ravine was covered with tall heavy brush, limiting the photographic opportunities.