Intersections with other roads are few, which can be problematic in the event of road closures due to acts of nature such as landslides and fires. At about the midpoint of the highway is the junction with the north terminus of State Route 39. However, access to State Route 39 is not possible as it is closed indefinitely to automobile traffic because of persistent landslides along its route. Therefore, travelers to the Angeles National Forest preferring the Angeles Crest Highway corridor should expect to be on the Angeles Crest Highway throughout much of its length, use available alternate routing where possible, or be willing to turn around and retrace their trip at any point along its route if necessary.