Missouri State Route 116 runs east-west across Southern Clinton County. It runs from the Clinton/Caldwell County Line to the Buchanan/Clinton County Line. MO St Rt 116 passes through the following towns in Clinton County. Lathrop Plattsburg MO St Rt 33 is multi-plexed in Clinton County. Missouri State Route 33, from near Lathrop, to near Plattsburg. MO St Rt 116 intersects the following highways in Clinton County. U.S. Rt. 69, near Lathrop. Interstate 35, near Lathrop. Missouri State Route 33, near Lathrop. Missouri Secondary State Route A, near Lathrop. Missouri Secondary State Route W, near Lathrop. Missouri State Route 33, near Plattsburg. Missouri Secondary State Route C, at Plattsburg. Missouri Secondary State Route Y, at Plattsburg. Missouri Secondary State Route K, at Plattsburg. U.S. Rt. 169, near Grayson.