Interstate 80 West - Walnut to Council Bluffs

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Exit 40 departs I-80 westbound for U.S. 59 in the city of Avoca. Harlan, seat of Shelby County, lies 11 miles to the north at Iowa 44.
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U.S. 59 heads nine miles south from Iowa 83 in Avoca to Hancock and Botna Bend Park. U.S 59 combines with U.S. 6 six miles further south at Oakland.
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Lowering to cross Keg Creek, Interstate 80 west next meets CR L66 to Minden.
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The first sign for Interstate 880 appears 2.5 miles ahead of Exit 27. I-880 was designated in Fall 2019 in place of I-680 between I-80 and I-29 at Loveland.
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Interstate 880 bee lines west from I-80 across the Loess Hills to connect with I-29 north to Missouri Valley and Sioux City. I-680 formerly overlapped with I-29 south to Crescent en route to the north side of Omaha.
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Traveling north to Persia and Portsmouth, Iowa 191 ties into I-880 to the immediate west of I-80.
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Interstate 80 turns southwest along the Neola Diagonal toward Underwood and Council Bluffs while I-880 runs along the north Pottawattamie County line toward Beebeetown and Loveland. I-680 remains west of I-29 across the Mormon Bridge to Omaha, Nebraska.
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Interstate 80 parallels Mosquito Creek southwest from I-880 to the city of Council Bluffs. I-880 traverses the Loess Hills west to the Missouri River valley.
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Curving south through the three-wye interchange (Exit 27) with Interstate 880 on I-80 westbound.
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I-80 passes east of Neola adjacent to Mosquito Creek at Exit 23. CR L55 replaced Iowa 244 north along 2nd Street into the city.
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Entering the diamond interchange with CR L55 (298th Street) north to Neola and south to Arrowhead County Park.
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U.S. 6 converges with I-80 again 22 miles west from Oakland at Exit 8.
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With U.S. 6 along Broadway in Council Bluffs turned over to the city for maintenance, U.S. 6 was relocated southward along I-80 west and I-29 north in 2016. U.S. 6 along Kanesville Boulevard west from Exit 8 was redesignated as unsigned Iowa 906.
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Construction underway from September 2022 to June 2026 reconstructs Exit 5 for Madison Avenue into a tight urban diamond interchange meeting current design standards and capacity needs.¹
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Southwest from Madison Avenue, I-80/U.S. 6 converge with Interstate 29 at a systems interchange where a dual freeway configuration commences. The Local roadway provides access to Council Bluffs exits and nearby motorist services.
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Exit 4 A departs next for Interstate 29 south to St. Joseph and Kansas City, Missouri. Exit 4 B follows onto the I-29/80 Local roadway to Council Bluffs streets.
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The Local lanes utilize the Interstate 29 exit numbering system. Exit 49 departs in one mile for S Expressway (old Iowa 192). Exit 50 joins the Local lanes with S 24th Street in 2.25 miles. Exit 52 to Nebraska Avenue is beyond the separation with I-80 west along I-29/U.S. 6 north.
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Exit 4 to I-29 south formerly departed from the left side of Interstate 80 west. A new flyover was constructed from the outside lanes as part of the Council Bluffs Interstate System Improvement Program completed in August 2021.
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Traffic partitions on I-80/U.S. 6 westbound with three lanes continuing into the I-29/80 Express roadway to the West System Interchange with I-29 north. Exit 4 B separates with two lanes for the I-29/80 Local roadway ahead of S Expressway to Downtown Council Bluffs.
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