| Interstate Highways of the Missouri Highway System | |
|---|---|
Highway markers Interstate 44, Interstate 435,and Interstate Business Loop 55 | |
 Interstate Highways highlighted in red | |
| System information | |
| Maintained by MoDOT | |
| Formed | June 29, 1956 [1] |
| Highway names | |
| Interstates | Interstate nn (I‑nn) |
| System links | |
The Interstate Highways in Missouri are the segments of the national Dwight D. Eisenhower System of Interstate and Defense Highways [2] that are owned and maintained by the U.S. state of Missouri.
| Number | Length (mi) [3] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-29 | 128.584 | 206.936 | Downtown Loop in Kansas City, Missouri | I‑29 at Iowa state line south of Hamburg, IA | 1963 | current | ||
 I-35 | 114.448 | 184.186 | I‑35 at Kansas City, Missouri | I‑35 north of Eagleville | 1972 | current | ||
 I-44 | 293.184 | 471.834 | I‑44 west of Joplin | I‑70 in St. Louis | 1956 | current | ||
 I-49 | 178.717 | 287.617 | I-49 south of Pineville | I‑470 in Kansas City | 2012 [4] | current | Extended into Arkansas | |
 I-55 | 210.45 | 338.69 | I‑55 south of Steele | I‑55/I‑64 at St. Louis | 1956 | current | ||
 I-57 | 22.056 | 35.496 | I‑55 at Sikeston | I-57 north of Charleston | — | — | Will be extended into Arkansas | |
 I-64 | 40.816 | 65.687 | I‑70 at Wentzville | I‑64 at St. Louis | 1956 | current | ||
 I-66 | 340 | 550 | Kansas state line west of Joplin | Kentucky state line south of Cairo, IL | 1991 | 2015 | Proposed as part of the East–West TransAmerica Corridor in 1991 | |
 I-70 | 250.063 | 402.437 | I‑70 at Kansas City | I‑70 at St. Louis | 1956 | current | ||
 I-72 | 2.056 | 3.309 | US 36/US 61 in Hannibal | I-72 at Hannibal | — | — | A 157-mile (253 km) extension has been proposed to Cameron | |
| ||||||||
| Number | Length (mi) [3] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-144 | 15.4 | 24.8 | I‑70 in Bridgeton | Missouri/Illinois state line | — | — | Proposal for what would become I-244. | |
 I-155 | 10.834 | 17.436 | I‑55/US 61 east of Hayti | I‑155 east of Caruthersville | — | — | ||
 I-170 | 11.255 | 18.113 | I‑64/US 40 in Richmond Heights | I‑270 in Hazelwood | — | — | ||
 I-229 | 15.022 | 24.176 | I‑29/US 71 in St. Joseph | I‑29/US 59/US 71 north of St. Joseph | 1986 | current | ||
 I-244 | 21.047 | 33.872 | I‑55 south of Green Park | I‑70 in Bridgeton | — | — | Previous designation for part of I-270 | |
 I-255 | 3.979 | 6.404 | I‑55 south of Green Park | I‑255/US 50 at Illinois state line south of St. Louis | — | — | Missouri section of the eastern half of beltway around St. Louis | |
 I-270 | 35.497 | 57.127 | I‑55 south of Green Park | I‑270 at Illinois state line at St. Louis | — | — | Western half of beltway around St. Louis | |
 I-435 | 55.184 | 88.810 | I‑435 at Kansas City | I‑435 Kansas state line at Parkville | — | — | Missouri section of the beltway around Kansas City | |
 I-470 | 17.081 | 27.489 | I‑435/US 50/US 71 in Kansas City | I‑70 in Independence | 1970 [5] | current | ||
 I-635 | 3.766 | 6.061 | I‑635 at Kansas City | I‑29/US 71 in Kansas City | — | — | ||
 I-670 | 2.323 | 3.739 | I‑670 at Kansas City | I‑70/US 40 in Kansas City | — | — | ||
 I-755 | 4 | 6.4 | — | — | — | — | Cancelled proposed state highway/Interstate | |
| ||||||||
| Number | Length (mi) [3] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-29 BL | 14.063 | 22.632 | I-29 / US 169 in St. Joseph | I-29 / US 59 / US Bus. 71 in Jefferson Township | — | — | ||
 I-35 BL | 3.235 | 5.206 | I-35 / Route BB in Cameron | I-35 / US 36 / MO 110 in Cameron | — | — | ||
 I-44 BL | 11.529 | 18.554 | I-44 / MO 43 / MO 86 in Joplin | I-44 / MO 66 in Scotland | — | — | Serves Joplin | |
| I-44 BL | 4.333 | 6.973 | I-44 / MO 37 in Sarcoxie | I-44 / Old US 166 in Sarcoxie | — | — | ||
| I-44 BL | 2.736 | 4.403 | I-44 / Route H in Mount Vernon | I-44 / MO 39 in Mount Vernon | — | — | ||
| I-44 BL | 9.657 | 15.541 | I-44 / MO 266 in Springfield | I-44 / Route H in Springfield | — | — | ||
| I-44 BL | 3.668 | 5.903 | I-44 / Old US 66 in Lebanon | I-44 / Route MM in Lebanon | — | — | ||
| I-44 BL | 6.014 | 9.679 | I-44 / Route H in Waynesville | I-44 / Route Y in St. Robert | — | — | ||
 I-44 BS | 2.213 | 3.561 | I-44 / Route Y and Route Z in St. Robert | Fort Leonard Wood | — | — | ||
| I-44 BL | 2.449 | 3.941 | I-44 / Old US 66 in Rolla | I-44 / US 63 / Old US 66 in Rolla | — | — | ||
| I-44 BL | 9.026 | 14.526 | I-44 / MO 100 / Old US 66 (1926-1933) in Pacific | I-44 / Old US 66 (1933-1985) in Pacific | 1979 | current | ||
 I-49 BL | 9.740 | 15.675 | I-49 / Route AA in Neosho | I-49 / MO 86 in Neosho | 2012 | current | ||
| I-49 BL | 22.546 | 36.284 | I-49 / MO 175 in Tipton Ford | I-49 / MO 96 / MO 171 / MO 571 in Carthage | 2012 | current | Serves Joplin | |
| I-49 BL | 2.927 | 4.711 | I-49 / Route K in Nevada | I-49 / US Bus 71 in Nevada | 2012 | current | Replaces US Bus. 71 | |
| I-49 BL | 6.109 | 9.831 | I-49 / MO 52 in Butler | I-49 / Route F / Route D in Butler | 2012 | current | Former segment of US 71 | |
 I-55 BL | 5.751 | 9.255 | I-55 / US 61 / US 62 in New Madrid | I-55 / US 61 / US 62 in New Madrid | — | — | ||
| I-55 BL | 15.705 | 25.275 | I-55 / US 61 / MO 74 in Cape Girardeau | I-55 / US 61 in Fruitland | — | — | ||
| I-55 BL | 5.015 | 8.071 | I-55 / US 67 / US 61 in Crystal City | I-55 / McNutt Street in Herculaneum | — | — | ||
 I-57 BL | 2.94 | 4.73 | I-57 / US 60 / MO 105 in Charleston | I-57 / US 62 / MO 77 in Charleston | — | — | ||
 I-70 BL | 6.665 | 10.726 | I-70 / US 40 / MO 5 in Boonville | I-70 / MO 87 in Boonville | — | — | ||
| I-70 BL | 2.878 | 4.632 | I-70 / US 40 in Columbia | I-70 / US 40 in Columbia | — | — | ||
| I-70 BL | 2.831 | 4.556 | I-70 / MO 94 in St. Charles | I-70 in St. Charles | — | — | ||
Interstate 49 (I-49) is a north–south Interstate Highway with multiple segments. The original portion is entirely within Louisiana with an additional signed portion extending from I-220 in Shreveport to the Arkansas state line, three newer sections are in Arkansas, and one section in Missouri. Its southern terminus is in Lafayette, Louisiana, at I-10 while its northern terminus is in Kansas City, Missouri, at I-435 and I-470. Future plans include portions of the remaining roadway in Louisiana, Arkansas, and Texas, to link Kansas City, Missouri with New Orleans.
U.S. Route 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.
U.S. Route 50 or U.S. Highway 50 (US 50) is a major east–west route of the U.S. Highway system, stretching 3,019 miles (4,859 km) from Interstate 80 (I-80) in West Sacramento, California, to Maryland Route 528 in Ocean City, Maryland, on the Atlantic Ocean. Until 1972, when it was replaced by Interstate Highways west of the Sacramento area, it extended to San Francisco, near the Pacific Ocean. The Interstates were constructed later and are mostly separate from this route. It generally serves a corridor south of I-70 and I-80 and north of I-64 and I-40.
U.S. Route 71 or U.S. Highway 71 is a major north–south United States highway that extends for over 1500 miles (2500 km) in the central United States. This original 1926 route has remained largely unchanged by encroaching Interstate highways. Currently, the highway's northern terminus is in International Falls, Minnesota at the Canada–US border, at the southern end of the Fort Frances-International Falls International Bridge to Fort Frances, Ontario. U.S. Route 53 also ends here. On the other side of the bridge, Trans-Canada Highway is an east–west route while Ontario Highway 71 is a north–south route. US 71's southern terminus is between Port Barre and Krotz Springs, Louisiana at an intersection with U.S. Route 190. For the entirety south of Kansas City, Missouri, US 71 runs parallel and concurrent with the existing and future Interstate 49. North of Kansas City, US 71 runs halfway between Interstate 29 and Interstate 35, which they split in the city at an interchange with Interstate 70.
U.S. Highway 159 (US 159) is a 83.6-mile-long (134.5 km) auxiliary route of US 59. It travels from Nortonville, Kansas at US 59 to New Point, Missouri, also at US 59. The highway permits through traffic on US 59 to bypass the cities of Atchison, Kansas and Saint Joseph, Missouri, traveling instead through Falls City, Nebraska and Hiawatha, Kansas.
Interstate 540 (I-540) is a freeway spur route of I-40 in the US state of Arkansas in Fort Smith. The total length is 14.7 miles (23.7 km). At first, I-540 was a short spur connecting Fort Smith and Van Buren to I-40 as one of the original five Arkansas Interstates. The route ran 14.7 miles (23.7 km) to U.S. Highway 271 (US 271) near the Oklahoma state line. The growing Northwest Arkansas area and the University of Arkansas needed an Interstate connection to Little Rock, and through traffic north to Kansas City had also outgrown the winding US 71 north from I-40. The route was extended north to Mountainburg in the late 1990s on an all-new alignment with the route being completed to Bella Vista in January 1999. However, the segment north of I-40 became a part of I-49 in 2014.
Route 126 is a highway located entirely within Barton County in the U.S. state of Missouri. Its western terminus is at the Kansas state line, where K-126 ends. The route goes in a straight line for most of its length, and intersects Interstate 49 (I-49) and U.S. Route 71. Its eastern terminus is at US 160 and Route 37 in Golden City. The route was designated in 1942, and formerly consisted of two supplemental routes.
Interstate 635 (I-635) is a connector highway between I-35 in Overland Park, Kansas, and I-29 in Kansas City, Missouri, approximately 12 miles (19 km) long. It is mostly in the US state of Kansas, servicing the city of Kansas City, Kansas, but extends into Kansas City, Missouri, as well. The freeway's southern terminus is at a stack interchange with I-35. South of this, the mainline becomes an expressway carrying U.S. Route 69 (US 69).
Interstate 670 (I-670) is a 2.81-mile-long (4.52 km) connector highway between I-70 in Kansas City, Kansas, and I-70 in Kansas City, Missouri. The highway provides a more direct route through Downtown Kansas City than the older mainline I-70 and avoids the sharp turn of the latter at the west end of the Intercity Viaduct. I-670 also makes up the south side of Kansas City's Downtown Loop, where it passes under the southern half of the Kansas City Convention Center.
Interstate 470 (I-470) is a 16.72-mile (26.91 km) loop of the Interstate Highway System that links southeast Kansas City to Independence via Lee's Summit in Jackson County, Missouri. The western terminus of the freeway is at the Grandview Triangle interchange with I-49, I-435, U.S. Route 50 (US 50), and US 71 while the northern terminus is a cloverleaf interchange with I-70. The freeway travels west to east through southern Kansas City, curving toward the north at the Lee's Summit Municipal Airport and becoming concurrent with Route 291 as the highway travels north toward Independence.
K-32, also known as the Kaw Valley Scenic Highway, is an approximately 32.2-mile-long (51.8 km) east–west state highway in the Kansas City metropolitan area of Kansas. K-32's western terminus is just outside Lawrence at U.S. Route 24 (US-24) and US-40. Its eastern terminus is at US-69, also known as the 18th Street Expressway, in Kansas City. Along the way it intersects several major highways, including K-7 in Bonner Springs as well as Interstate 435 (I-435) and I-635 in Kansas City. In Kansas City, K-32 follows the Turner Diagonal from Kaw Drive to Kansas Avenue. From its western terminus to Bonner Springs, the highway is a two-lane rural highway; the remaining section is a four-lane highway that runs through residential areas.
K-104 is a 2.275-mile-long (3.661 km) state highway in Saline County in the U.S. State of Kansas. It is signed east–west even though the majority of the route runs north–south. The route begins at a junction with Interstate 135 (I-135) and U.S. Route 81 (US-81), at I-135 exit 86, to a junction with K-4. It has an annual average daily traffic of between 1000 and 1300 and is paved with composite pavement. The highway is not a part of the National Highway System. The route was established around 1967, and has not been changed since.
K-170 is a 21.759-mile-long (35.018 km) state highway in the U.S. State of Kansas. K-170's western terminus is at K-99 about 12 miles (19 km) north of Emporia, and the eastern terminus is at K-31 on the west side of Osage City, a mile south of the K-31 intersection with U.S. Route 56 (US-56). K-170 provides access, via county roads, to Lyons County State Fishing Lake.
U.S. Route 71 (US 71) is a major north–south U.S. Highway that runs from Louisiana to Canada. US 71 enters Missouri from Arkansas in the town of Jane. US 71 serves the cities of Joplin, Kansas City and St. Joseph. At noon on December 12, 2012, the section of US 71 between Pineville, Missouri and I-435 in south Kansas City was also designated as a northern extension of Interstate 49 (I-49).
U.S. Route 75 was a part of the United States Numbered Highway System that runs for 1,239 miles (1,994 km) from Dallas, Texas to Kittson County, Minnesota where it ends just short of the Canada–United States border. Within the State of Nebraska it is a state highway that enters Nebraska on the Kansas state line about 9 miles (14 km) south of Dawson and travels north across the extreme eastern portion of the state, to the Nebraska–Iowa border in South Sioux City where it crosses the Missouri River along a concurrency with Interstate 129. The northern 210 miles (340 km) of the route generally travels parallel to the Missouri River. The 87.32-mile (140.53 km) section between the I-680 interchange in Omaha and the Interstate 129 interchange is designated the Lewis & Clark Scenic Byway, one of nine scenic byways in the state.
U.S. Route 40 (US-40) is a part of the U.S. Highway System that runs from Interstate 80 (I-80) and US-189 in Silver Summit, Utah east to US-322 and Ocean Drive in Atlantic City, New Jersey. In the U.S. state of Kansas, US-40 is a main east–west highway that runs from the Colorado border east to the Missouri border. The highway is concurrent with Interstate 70 (I-70) from Oakley to Topeka, and again through Kansas City.
K-33 is an approximately 10.4-mile-long (16.7 km) north–south state highway in the U.S. state of Kansas. K-33's southern terminus is at K-68 in rural Franklin County east of Ottawa and the northern terminus is at U.S. Route 56 (US-56) in Douglas County, east of Baldwin City and southwest of Kansas City. K-33 provides an important link between US-56 and K-68 to Interstate 35 (I-35) and US-50 in Wellsville. K-33 is a two-lane rural highway for most of its length, except for the section within Wellsville.
Interstate 49 (I-49) is an Interstate Highway in the US state of Missouri that was designated on December 12, 2012. It overlaps U.S. Route 71 (US 71) in the western part of the state, beginning at the Arkansas state line, and ending at I-435 and I-470 on the southeast side of Kansas City.
U.S. Highway 75 (US 75) is a United States Highway in northwestern Iowa. It begins at the Missouri River on a bridge with Interstate 129 (I-129) and US 20. Immediately upon landing in Iowa from Nebraska, I-129 ends at an interchange with I-29. US 20 and US 75 continue around Sioux City on a four-lane expressway until US 20 exits to the east. US 75 heads to the north-northeast, parallel to the Floyd River, until Le Mars. There, Iowa Highway 60 (Iowa 60) continues northeastward on the expressway while US 75 heads due north. Near Hull, it is briefly overlapped by US 18. It leaves the state and enters Minnesota north of Rock Rapids.
U.S. Bicycle Route 66 (USBR 66) is a United States Bicycle Route that follows the former U.S. Route 66 (US 66) across the United States. The first section of the route, spanning 358 miles (576 km) between Baxter Springs, Kansas, and St. Louis, Missouri, was designated as USBR 66 in 2018. A second section was designated in 2021 between Santa Monica, California, and the Arizona state line near Needles, California. The Oklahoma section was designated in 2022. The rest of the route remains proposed but not yet designated.
Media related to Interstate Highways in Missouri at Wikimedia Commons
