This roadway is mostly two lanes and runs through a somewhat rural section of the Chino Hills. It passes by a large state park – Chino Hills State Park, as well as a few small housing developments and open spaces. Near the Orange / San Bernardino County line, the road reaches a low summit with a couple of very sharp curves. Commuters, as well as locals, use this roadway, making it quite congested during peak times. Beyond minor upgrades along the way, there are no plans to widen this roadway beyond its current two-lane configuration.
Carbon Canyon Road in San Bernardino County: