Interstate 470 Kansas
Interstate 470 in Kansas provides a bypass loop of Interstate 70 and the Polk-Quincy Viaduct through Downtown Topeka. The western half, Dr. Martin Luther King, Jr. Memorial Highway, constitutes a commuter route and part of U.S. 75, a major north-south route topeka. The eastern half runs along the tolled Kansas Turnpike between Interchanges 177 and 183.
The section of Interstate 470 that overlays the Kansas Turnpike was constructed in 1955 and 1956, with the entire turnpike opening on October 21, 1956. The portions of the Kansas Turnpike that carry Interstates 35, 70, and 470 were approved as part of the Interstate Highway System by the Federal Highway Administration (FHWA) in 1957. The remainder of I-470 (free section) was constructed in the 1960s.1
A $94-million project started in 1997 redesigned the East Topeka Interchange on the Kansas Turnpike where Interstates 70 and 470 come together with U.S. 40 and K-4. A new alignment and main line toll plaza for Interstate 70 was constructed, bringing the freeway onto the Turnpike mainline via a high-speed wye interchange at the east end of I-470. This eliminated a trumpet interchange and access road leading north to where I-70 presently meets Rice Road at Exit 365 today. The work also added access to the Oakland Expressway, the route of K-4 northward across the Kansas River to U.S. 24. The new East Topeka Interchange opened to traffic on August 1, 2001.2
East End – Tecumseh, KS
West End – Topeka, KS
Mileage – 13.72
Cities – Topeka
- Junctions –
Source: December 31, 2017 Interstate Route Log and Finders List
The Topeka Inset in the 1960 Rand McNally Road Atlas showed Interstate 470 as Bypass I-70.
A substandard connection previously connected Interstate 70 with the original East Topeka Interchange and U.S. 75 Bypass was designated along the free portion of Interstate 470.
East End – Tecumseh, Kansas
West End – west Topeka, Kansas
- Kansas Interstate 50th Anniversary
- "New interchange opening – $94-million project will open more direct routes for Topeka commuters." Journal-World (Lawrence, KS), August 1, 2001.
- "Two lanes of I-70 to stay open for games." KUsports.com, August 25, 2005.
- "Kansas Turnpike lane widening planned from city to K-7." Lawrence Journal-World (KS), April 4, 2010.
- "Turnpike travelers find service-area changes." Lawrence Journal-World (KS), May 12, 2002.
Page updated November 8, 2016.