Complex sentence: The old section of roadway included some of the more dangerous features of the old Saddle Road: a sharp curve, blind corner and one way bridge near the entrance to Mauna Kea State Recreation Area that was one of the worst on the roadway.
Split into simpler sentences: The old section of roadway included some of the more dangerous features of the old Saddle Road. This included a sharp curve, blind corner and one way bridge near the entrance to Mauna Kea State Recreation Area that was one of the worst on the roadway.