Route 129 is a highway in northern and central Missouri. Its northern terminus is at the Iowa state line where it continues as Iowa Highway T20; its southern terminus is at Route 3 in Roanoke. Missouri Department of Transportation (also refered to as MoDot) is in charge of maintaining public roadways of Missouri. ... A mile is a unit of length, usually used to measure distance, in a number of different systems, including Imperial units, United States customary units and Norwegian/Swedish mil. ... km redirects here. ... This article or section does not adequately cite its references or sources. ... Green City is a city located in Sullivan County, Missouri. ... Winigan is an unincorporated community in southeastern Sullivan County, Missouri. ... New Boston is an unincorporated community in eastern Linn County, Missouri. ... Bucklin is a city located in Linn County, Missouri. ... Salisbury is a city located in Chariton County, Missouri. ... State highways in Missouri were first designated in 1922 and Missouris system was used (along with Wisconsins) as a plan for the entire U.S. Highway System which was created in 1926. ... Missouri Supplental Routes are officially designated as State Secondary Roads. They are roads within the state of Missouri designated with letters. ... Official language(s) English Capital Jefferson City Largest city Kansas City Area Ranked 21st - Total 69,709 sq mi (180,693 km²) - Width 240 miles (385 km) - Length 300 miles (480 km) - % water 1. ... This article or section does not adequately cite its references or sources. ...