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 an interchange with I-70 in western Topeka and heads generally southeast, running concurrent with U.S. Highway 75 (US-75).
After traveling 7.03 miles (11.31 km) as the Kansas Turnpike, I-470 reaches its eastern terminus at I-70.
The highway has annual average daily traffic (AADT) values as high as 43,000 west of Gage Boulevard to as low as 10,370 near the eastern terminus.
Vehicles merging onto eastbound I-470 must access the entrance ramp from Wanamaker Road.
[5][6] The tollway continues northeastward through southeastern Topeka, passing near to Lake Shawnee and eventually reaching I-470's terminus at I-70, which the turnpike carries east.
As part of this role, KDOT surveys traffic on Kansas highways in terms of AADT.
[13][2] On October 21, 1960, the western section of I-470 was dedicated by the state highway department and the KTA and opened to traffic.