Route 21 is a highway in eastern

Missouri Missouri is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. Ranking List of U.S. states and territories by area, 21st in land area, it is bordered by eight states (tied for the most with Tennessee ...

. Its northern terminus is at Route 30 in

Affton Affton is a census-designated place (CDP) in south St. Louis County, Missouri, United States, near St. Louis. The population was 20,417 at the 2020 United States Census. Geography Affton is located at 38°33'4" North, 90°19'25" West (38.551052 ...

. Its southern terminus is at the

Arkansas Arkansas ( ) is a landlocked state in the South Central United States. It is bordered by Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, and Texas and Oklahoma to the west. Its name is from the Osage ...

state line (where it continues as Highway 115). In the St. Louis area, it is known as Tesson Ferry Road, which was named after the 19th century proprietor of the ferry across the

Meramec River The Meramec River (), sometimes spelled Maramec River, is one of the longest free-flowing waterways in the U.S. state of Missouri, draining Blanc, Caldwell, and Hawk. "Location" while wandering Blanc, Caldwell, and Hawk. "Executive Summary" fr ...

. The section through northern

Jefferson County, Missouri Jefferson County is located in the eastern portion of the state of Missouri. It is a part of the St. Louis Metropolitan Area. As of the 2020 census, the population was 226,739, making it the sixth-most populous county in Missouri. Its county s ...

was considered dangerous. As a result, the road was rerouted and built to

freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms ...

standards. Construction to reroute the highway to just south of Hillsboro was completed on December 15, 2008 and Route 21 is currently freeway standard from Route 141 to Highway B. Plans to extend the freeway south to DeSoto have been approved, but funds are lacking to complete this part of the project. Route 21 from the Meramec River to Route B, along with Route M, make up the Jefferson County Scenic Byway.Jefferson County examines 'scenic byways' designation for routes 21 and M

Major intersections

Hillsboro Business Spur

Business 21 follows the old alignment of Route 21 through the city of Hillsboro. It begins at the intersection of Route 21 and Highway B on the southern edge of the city, and continues north to the intersection of Route A and Old Route 21, where it ends. Business 21 is the only way one can now reach Route BB, as the rerouting of Route 21 bypasses the road.

References

External links

021 Transportation in Ripley County, Missouri Transportation in Carter County, Missouri Transportation in Reynolds County, Missouri Transportation in Iron County, Missouri Transportation in Washington County, Missouri Transportation in Jefferson County, Missouri Transportation in St. Louis County, Missouri {{Missouri-road-stub

Major intersections

Hillsboro Business Spur

See also

References

External links