Common: US 166 / US 400
near Joplin. US 166 may have been cut back to this point in the 1960's, and US 400 has ended here since its inception in 1994.
US 66 east end, 1979-1985
Joplin
US 166 east end, 1945-1960s(?)
Springfield
US 160 east end, 1930-1954(?)
Springfield
US 160 east end, 1954(?)-2007
Poplar Bluff
US 67 north end, 1926-1930
Fredericktown
US 275 south end, 1963-present
Rock Port
US 159 north end, 1945-1970s
Craig
US 159 north end, 1970s-present
near Mound City
US 275 south end, 1932-1963
St. Joseph
US 136 west end, 1951-1960
St. Joseph
US 56 east end, 1990s-present
Kansas City
US 56 east end, 1961-1964
Independence
US 24 west end, 1926-1936
Kansas City
US 69 south end, 1926-1935
Kansas City
US 460 west end, 1947-1977
St. Louis (try switching to "Satellite" mode and zooming in all the way. Then you can mouse-over the different paths to see how this junction was configured.)
US 56 east end, 1957-1961
Kansas City
US 160 east end, 2007-present
near Poplar Bluff
Unknown: US 169 south end, 1930-1935
Kansas City (not sure of location - I'm assuming 169 traffic would've crossed the river via the Burlington Street bridge.)
US 56 east end, 1964-1990s
Kansas City