Interstate 470 (Kansas)

Interstate 470
Route information
Maintained by KDOT and Kansas Turnpike Authority
Length: 13.72 mi[1] (22.08 km)
Major junctions
West end: I-70 / US-40 / US-75 / K-4 in Topeka
  US-75 in Topeka
I-335 / KTA in Topeka
East end: I-70 / KTA in Topeka
Highway system

Auxiliary route of the Interstate Highway System
Main • Auxiliary • Business

Kansas numbered highways

← I-435 I-635 →

Interstate 470 (I-470) is a 13.72-mile (22.08 km) loop highway that bypasses the downtown area of Topeka, Kansas . I-470 begins at I-70 in western Topeka and heads southeast, running concurrent with U.S. Route 75 (US 75). At the I-470 junction with I-335, the freeway becomes part of the Kansas Turnpike until I-470 reaches its eastern terminus with I-70. The Kansas Turnpike was opened in the 1950s, comprising the eastern portion of the route. Several years later, in the early 1960s, the western section of I-470 was opened to traffic.

Contents

Route description

Interstate 470 begins in the northwestern part of Topeka at an interchange with I-70, US-40, and K-4. US-75 approaches the interchange from the east and joins I-470. The two routes head southeastward along the western edge of the city.[2] Along this stretch of the interstate, there are three interchanges; exits 1B, 2, and 3. Because of both the southeast-to-northwest alignment of the road and the proximity of two cross-streets, exits 1B and 3 are each made up of two half-diamond interchanges. At exit 1B, traffic leaving eastbound I-470 is deposited onto Huntoon Street. Vehicles merging onto eastbound I-470 must access the entrance ramp from Wanamaker Road. The intersection of Huntoon and Wanamaker is adjacent to the freeway.[3] Exit 3 is constructed similarly to exit 1B, while exit 2 is a standard diamond interchange.

Through southern Topeka, I-470 / US-75 curve to the south-southeast where they intersect Gage Boulevard. Further southeast, US-75 splits away from I-470 at a complex interchange with Burlingame Road.[1] Just east of the US-75 interchange, there are two trumpet interchanges in quick succession. The first provides access to Topeka Boulevard, and the second connects to the Kansas Turnpike. It also marks the northern end of I-335. I-470 merges onto the Kansas Turnpike and the two routes head northeast towards I-70.[4][5] The tollway continues northeastward through southeastern Topeka, passing near to Lake Shawnee and eventually reaching I-470's terminus at I-70.[6]

The freeway is maintained by the Kansas Department of Transportation (KDOT), who is responsible for maintaining and constructing highways in Kansas. As part of this role, KDOT surveys traffic on their highways in terms of average annual daily traffic (AADT), which is a measure of traffic volume for any average day of the year. In 2007, KDOT calculated that as few as 10,370 vehicles used I-470 daily along the Kansas Turnpike near the I-70 interchange and as many as 43,000 vehicles used I-470 daily west of the Gage Boulevard interchange.[7] As part of the Interstate Highway System, the entire route is listed on the National Highway System, a system of roads that are important to the nation's economy, defense, and mobility.[8]

History

The section of I-470 that now runs along the Kansas Turnpike was opened in 1956, and was the first part of I-470 to be built.[9][10] After the founding of the Interstate Highway System that same year, several Interstate freeways were planned through Topeka, including I-70, I-335, and I-470.[11] Construction began on I-470 after I-70's completion through Topeka. The segment of the I-470 freeway from the I-70 interchange to the Kansas Turnpike, most of which is concurrent with US 75 was still under construction in 1960.[12] The next year, in 1961, the unfinished section of I-470 was opened to traffic.[13][14] Since completion of the freeway, the route has not been changed. It retains its original routing.[15]

Exit list

The entire route is in Topeka, Shawnee County.

Mile[16][6] Exit Destinations Notes
0.00 1A I-70 / US-40 / K-4 Westbound exit and eastbound entrance, exit 1A is for KC bound
1.05 1B Huntoon Street, Wanamaker Road
2.22 2 21st Street
3.35 3 29th Street, Fairlawn Road
4.30 4 Gage Boulevard
5.74 5 US-75 south / Burlingame Road East end of US-75 overlap
6.6 6 Topeka Boulevard Last free exit eastbound; former US-75
West end of toll road
6.69 I-335 south / KTA south – Wichita, Emporia West end of KTA overlap; left exit westbound
13.72 I-70 / US-40 / K-4 / KTA Eastbound exit and westbound entrance
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

  1. ^ a b Federal Highway Administration. "Route Log - Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways - Table 2". http://www.fhwa.dot.gov/reports/routefinder/table2.htm. Retrieved February 17, 2011. 
  2. ^ Kansas Department of Transportation. Map of Shawnee County, Kansas (Map). http://ksdot.org/burtransplan/maps/Mapscounties.asp. Retrieved February 17, 2011. 
  3. ^ Google, Inc. Google Maps – I-470 exit 1B (Map). Cartography by Google, Inc. http://maps.google.com/maps?f=q&source=s_q&hl=en&geocode=&q=Topeka&aq=&sll=37.0625,-95.677068&sspn=31.646818,56.513672&ie=UTF8&hq=&hnear=Topeka,+Shawnee,+Kansas&ll=39.042703,-95.762222&spn=0.007566,0.013797&z=16. Retrieved February 19, 2011. 
  4. ^ Kansas Turnpike Authority. Map of Kansas Turnpike (Map). http://ksturnpike.com/kta_map.shtml. Retrieved February 17, 2011. 
  5. ^ "Road Work to Affect I-70, I-470". Topeka Capital-Journal. June 24, 2010. http://cjonline.com/news/local/2010-06-24/road_work_to_affect_i_70_470. Retrieved February 17, 2011. 
  6. ^ a b Microsoft. Map of I-470 – Bing Maps (Map). Cartography by NavTEQ, Inc. http://www.bing.com/maps/#JmNwPTM5LjAzOTk4MTc5ODYyMzAxfi05NS42ODExOTU3ODAwOTE5NyZsdmw9MTImZGlyPTAmc3R5PXImcnRwPXBvcy4zOS4wNDkxOTk4MzMyNzI3NjZfLTk1Ljc3MTU3ODUzMDA3MDE5X25lYXIlMjBSYW1wJTJDJTIwVG9wZWthJTJDJTIwS1MlMjA2NjYxNV9fX2FffnYuMzkuMDMwNzYxNzMxMDI5ODM0Xy05NS41OTA4MTMwMzAxMTM3NV9JLTQ3MCUyMEVhc3QlMjAlMkYlMjBLYW5zYXMlMjBUcGtlfnBvcy4zOS4wMzA4MzY3MzkxOTg0MDZfLTk1LjU5MDgxMzAzMDExMzc1X19fX2FfJm1vZGU9RCZydG9wPTB+MH4wfg==. Retrieved January 24, 2011. 
  7. ^ Kansas Department of Transportation (August 2007) (PDF). KDOT Traffic Count Map of Topeka (Map). http://www.ksdot.org/burtransplan/maps/MapCountCities.asp. Retrieved February 19, 2011. 
  8. ^ Federal Highway Administration (July 2003) (PDF). National Highway System: Topeka, Kansas (Map). http://www.fhwa.dot.gov/planning/nhs/maps/ks/topeka_ks.pdf. Retrieved February 19, 2011. 
  9. ^ "Big Impact Seen For Local Area In Superhighway". Lawrence Daily Journal-World: pp. 1–2. October 24, 1956. 
  10. ^ "KTA Officials Say Traffic Heavy on Pike This Morning". Lawrence Daily Journal-World. October 20, 1956. 
  11. ^ Kansas Department of Transportation. 1957-1958 Kansas highway map (Map). http://www.ksdot.org/burtransplan/maps/HistoricStateMaps.asp. Retrieved January 27, 2011. 
  12. ^ Kansas Department of Transportation. 1960 Kansas highway map (Map). http://www.ksdot.org/burtransplan/maps/HistoricStateMaps.asp. Retrieved January 27, 2011. 
  13. ^ Kansas Department of Transportation. 1961 Kansas highway map (Map). http://www.ksdot.org/burtransplan/maps/HistoricStateMaps.asp. Retrieved January 27, 2011. 
  14. ^ Kansas Department of Transportation. 1962 Kansas highway map (Map). http://www.ksdot.org/burtransplan/maps/HistoricStateMaps.asp. Retrieved February 22, 2011. 
  15. ^ Kansas Department of Transportation. 2011 Kansas highway map (Map). http://www.ksdot.org/burtransplan/maps/HistoricStateMaps.asp. Retrieved February 17, 2011. 
  16. ^ Kansas Department of Transportation. "2010 Condition Survey Report for Shawnee County, Kansas". http://www.ksdot.org/matreslab/pmis/query.asp. Retrieved February 21, 2011. 
Colorado: 270 • 470 (former) — Kansas: 470 — Missouri: 170 • 470 — Ohio: 270 • 670 — Maryland: 170 (former) • 270 • 270 Spur • 370 — Multi-state: 270 (IL–MO) • 470 (OH–WV) • 670 (KS–MO)