Interstate 229

Interstate 229

Interstate 229 constitutes an 11.345 mile urban loop through Sioux Falls between I-29 in southern parts of the city and I-90 to the northeast. The freeway mostly acts as a commuter route and was completed in 1962. 2015 traffic counts conducted by SDDOT along I-229 range from a high of 44,440 vehicles per day (vpd) between Exits 2 and 3 and 15,740 vpd at the northern terminus.

Interstate 229 South Dakota Guides

Construction started in March 2016 redesigned the trumpet interchange joining I-29 and I-229 in south Sioux Falls. Work expanded I-29 to six overall lanes between the Tea interchange (Exit 73) and the 57th Street overpass. This included replacing both bridges over the ramps with Interstate 229. The southbound lanes were rebuilt in Phase 1, while Phase 2 replaced the concrete surface of the northbound lanes. The $33.8 million project also included expanding Exit 75 to I-229 north from I-29 north to two lanes and reconfiguring the southbound loop to I-229 from I-29. Work was scheduled to wrap up on November 4, 2016,1 and SDDOT announced that the phase was completed on November 17, 2016.2

Future work on I-229 redesigns the folded diamond interchange at Exit 5 as part of a $20.7 million widening project along 26th Street. New ramps will join the south side of I-229 with 26th Street directly. Presently the on and off-ramps tie into Yeager Road, which parallels I-229 south from 26th to 33rd Streets.3

References:

  1. "Construction to Begin On I-29 and I-229." KELO (Sioux Falls, SD), March 9, 2016.
  2. I-29/I-229 Sioux Falls. SDDOT, project web site. Accessed on January 26, 2017.
  3. "26th Street construction in 2019 to reduce congestion, crashes." Argus Leader (Sioux Falls, SD), July 3, 2016.

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Page Updated Tuesday February 18, 2020.