Interstate 129 East

U.S. 20 proceeds one mile east from Elgin Avenue to the cloverleaf interchange (Exit 1) with U.S. 75 south and U.S. 77 outside South Sioux City.
06/17/15

Milepost zero for Interstate 129 stands at the crossover preceding the Lake Avenue underpass just beyond this shield assembly along U.S. 20 eastbound.
06/17/15

U.S. 75 combines with U.S. 77 south from I-129/U.S. 20, 14 miles to Winnebago in Thurston County.
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Exit 1A departs from I-129/U.S. 20 east for U.S. 75/77 south to the nearby Dakota/Thurston County Fairgrounds and Dakota City.
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Exit 1B loops onto U.S. 77 north to South Sioux City and Downtown Sioux City, Iowa. U.S. 77 concludes in 3.4 miles at I-29 and U.S. 20 Business (Gordon Drive).
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U.S. 75 combines with I-129/U.S. 20 east into Sioux City, Iowa.
06/17/15

The previous first shield for Interstate 129 east.
04/20/07

Ascending across wetland areas linking Crystal Cove and Gateway Lake, I-129/U.S. 20-75 advance a quarter mile to Exit 2 for Dakota Avenue (U.S. 20 Business).
06/17/15

I-129/U.S. 20-75 cross over BNSF Railroad lines leading into the parclo interchange (Exit 2) with Dakota Avenue / IBP Avenue.
06/17/15

Dakota Avenue north through South Sioux City is U.S. 20 Business, though the route is sparsely signed. U.S. 20 Business combines with U.S. 77 across the Missouri River into Sioux City, where it turns onto Gordon Drive east back to U.S. 20.
06/17/15

Continuing east from Dakota Avenue, I-129/U.S. 20-75 meet Interstate 29 in two miles. Exit numbers along I-129 reset at the Iowa state line.
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The freeway bends southward across agricultural areas between G Street and the Missouri River.
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The directional cloverleaf interchange (Exit 1) with Interstate 29 lies at the east end of the Sergeant Floyd Memorial Bridge.
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The succeeding ramp (Exit 1A) connects with I-29 south to Sioux Gateway Airport (SUX).
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Climbing onto the Sergeant Floyd Memorial Bridge across the Missouri River.
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Trailblazers for U.S. 75 Business preceded Exit 1A for I-29 south. Established in 2002, U.S. 75 Business in Sioux City follows a combination of I-29 south, Singing Hills Boulevard east and Old Highway 75 / Lewis Boulevard north.
04/20/07

Trailblazers for U.S. 75 Business preceded Exit 1A for I-29 south. Established in 2002, U.S. 75 Business in Sioux City follows a combination of I-29 south, Singing Hills Boulevard east and Old Highway 75 / Lewis Boulevard north.
04/20/07

Interstate 129 ends within the exchange joining U.S. 20/75 with I-29. I-29 heads south to Council Bluffs and Kansas City.
06/17/15

Interstate 29 runs along the Missouri Riverfront northward to Downtown Sioux City en route to Sioux Falls, South Dakota. Beyond Sioux City, U.S. 20 continues to Fort Dodge and Waterloo while U.S. 75 ventures north to Le Mars.
06/17/15