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Interstate 635 (Kansas–Missouri)

Interstate 635 marker

Interstate 635
Harry Darby Memorial Highway
Route information
Length: 12.67 mi[1] (20.39 km)
Major junctions
South end: I‑35 / US-69 in Overland Park, KS
  K-32 in Kansas City, KS
I‑70 / US-24 / US-40 in Kansas City, KS
K-5 in Kansas City, KS
US 69 / Route 9 in Riverside, MO
North end: I-29 / US 71 in Kansas City, MO
Highway system
Kansas numbered highways
I‑470 KS I‑670
Route 571 MO I-670

Interstate 635 (abbreviated I-635) is a connector highway between Interstate 35 in Overland Park, Kansas and Interstate 29 in Kansas City, Missouri, approximately 12 miles (19.5 kilometers) long. It is mostly in the U.S. 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. 69.

The freeway provides a route around downtown Kansas City by crossing through residential areas of Kansas City, Kansas and Riverside, Missouri. It also provides another direct route to Kansas City International Airport.


  • Route description 1
    • Kansas 1.1
    • Missouri 1.2
  • History 2
  • Exit list 3
  • References 4
  • External links 5

Route description


Interstate 635 begins at I-35 in Johnson County, near Shawnee, Kansas. There is a Parclo Interchange with Merriam Drive almost immediately after its terminus. It then enters Wyandotte County and Kansas City, Kansas. There is a diamond interchange with Shawnee Drive and a Parclo Interchange with Metropolitan Avenue upon entering the Argentine neighborhood. There is an interchange with K-32/Kansas Avenue and then crosses the Kansas River into central Kansas City, KS. Immediately after crossing the river, there is an interchange with I-70. There are several interchanges further north, including State Avenue, Parallel Parkway, and Leavenworth Road. The last public interchange before entering Missouri is K-5. A private maintenance facility crossing at grade exists between this exit and the Missouri River.


Like Interstate 435, I-635's mileposts do not reset after crossing into Missouri.

I-635 crosses the Missouri River from Kansas into Platte County and the city of Riverside, MO. There is an interchange with Horizons Parkway, then US-69. US-69 briefly runs concurrently with I-635 north before exiting at the interchange with MO-9. I-635 runs a few more miles north, then terminates at I-29/US-71.


Missouri began the plans for I-635 in 1958 when AASHO approved proposals that also included what would become I-435 and I-470; the plan for I-635 took the route eastward along what is now K-5 to U.S. 69 and northward across the Fairfax Bridge toward I-29.[2] When money from the Highway Trust Fund became available for a new Missouri River crossing, I-635 got a more westward alignment after 1968.[2] Part of the original alignment was built as a spur going into Fairfax as K-5.[3]

In 1990 the highway was given the name Harry Darby Memorial Highway, in honor of U.S. Senator Harry Darby.[4][5][6]

The interchange with I-70 and the bridge over the Santa Fe Railyard in Argentine was reconstructed.

Maintenance work on the bridge over the Missouri River finished in September 2005.

Exit list

County Location mi km Exit Destinations Notes
Johnson Overland Park 0.00 0.00 1A I‑35 / US-69 north – Wichita, Des Moines Southern terminus of I-635. Southbound exit and northbound entrance. Roadway continues as US-69 south (Metcalf Avenue); I-35 exits 231A-B.
Wyandotte Kansas City 1B Merriam Lane, Merriam Drive
1C Shawnee Drive
2A Metropolitan Avenue
2B Swartz Road Southbound exit and northbound entrance
3 K-32 (Kansas Avenue)
4 I‑70 / US-24 / US-40 – Topeka, St. Louis Signed as exits 4A (east) & 4B (west); I-70 east exits 418A-B; west exit 419.
5 State Avenue
6 Parallel Parkway
7 K-5 north (Leavenworth Road) / 38th Street Southern terminus of K-5 concurrency
8 K-5 south / 18th Street Northern terminus of K-5 concurrency
Missouri River Kansas–Missouri state line
Platte Riverside 9 Horizons Parkway, Argosy Casino Parkway
10 US 69 south Southern terminus of US 69 concurrency, southbound exit and northbound entrance
11 US 69 north / Route 9 – Riverside, Parkville Northern terminus of US 69 concurrency
12 I-29 / US 71 – Kansas City International Airport, St. Joseph, Downtown Signed as exits 12A (north) and 12B (south); northern terminus of I-635; I-29 exit 3B (MO).
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "Route Log - Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 2".  
  2. ^ a b "Interstate 635 Kansas / Missouri". AARoads. Retrieved 2015-07-19. 
  3. ^ "1968 Official Road Map of Kansas Inset Side from KSDOT" (PDF).  
  4. ^ "Statute Number: 68-1037". Kansas Statutes Annotated. Kansas Department of Revenue’s Policy Information Library. Retrieved 2015-07-19. 
  5. ^ "Memorial/Commemorative Highway Signs, Payments Toward Those Signs" ( 
  6. ^ "Highways Named and Signed by Commission Action" ( 

External links

  • Kansas Highway Maps: Current, Historic, KDOT
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