Ohio State Route 29 runs east-west in Madison County. It passes through the cenral portion of the county. This runs from the Champaign/Madison County Line to West Jefferson. OH St Rt 29 passes through the following town in Madison County. West Jefferson OH St Rt 29 is not multi-plexed in Madison County. OH St Rt 29 intersects the following highways in Madison County. Ohio State Route 38, near Plumwood. U.S. Rt. 42, near Gillivan. Interstate 70, near West Jefferson. U.S. Rt. 40, at West Jefferson.