U.S. Route 400

U.S. Route 400
U.S. Route 400
	US 400 highlighted in red
Route information
	Maintained by CDOT, KDOT, MoDOT, and the city of Cimarron
Length	481.306 mi (774.587 km)
Existed	1994–present
History	Extended west in 1996
Major junctions
West end	US 50 / US 385 in Granada, CO
	US-83 / K-156 in Garden City, KS; US-50 / US-56 / US-283 in Dodge City, KS; I-235 in Wichita, KS; I-135 / US-81 / K-15 in Wichita, KS; I-35 / Kansas Turnpike at Wichita, KS; US-54 / US-77 by Augusta, KS; US-75 east of Fredonia, KS; US-69 at Pittsburg, KS; ; US 69 Alt. at Crestline, KS; US-166 east of Baxter Springs, KS;
East end	I-44 / US 166 in Joplin, MO
Location
Country	United States
States	Colorado, Kansas, Missouri
Highway system
	United States Numbered Highway System; List; Special; Divided;
	Colorado State Highway System; Interstate; US; State; Scenic;
	Kansas State Highway System; Interstate; US; State; Spurs;
	Missouri State Highway System; Interstate; US; State; Supplemental;

U.S. Route 400 (US 400) is a 481.306-mile-long (774.587 km) mostly east–west U.S. Highway, commissioned in 1994. The highway's western terminus is in Granada, Colorado, at an intersection with US 385. The highway's eastern terminus is southwest of Joplin, Missouri, near Loma Linda, at an interchange with Interstate 44, with which it shares with US 166. It originally ended in Garden City, Kansas; in 1996 it was extended to its current western terminus.