Sangamon County Highway 8 runs east-west in Western Sangamon County. From the western city limits of Springfield to the Mason/Sangamon County Line. SCH 8 passes through the following towns in Sangamon County. Springfield Berlin SCH 21 intersects the following highways in Sangamon County. Sangamon County Highway 17, near Springfield. Sangamon County Highway 15, near Riddle Hill. Sangamon County Highway 10, at Berlin.