Interstate 29 or I -29 is an Interstate Highway in the U.S. state of Iowa. The highway runs north-south through the far west of the state, parallel to the Missouri River. The road crosses the border from Missouri at Hamburg, passing through Council Bluffs, a suburb of Omaha, to Sioux City on the South Dakota border. The route is 257 kilometers long.
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I-29 runs south-north through western Iowa, through the Missouri River valley, parallel to the border with Nebraska. Interstate 29 in Missouri comes from Kansas City and travels about 50 miles (80 km) through flat agricultural land after the state line. To the east is a low ridge. I-29 has 2×2 lanes and opens up the countryside here. At Glenwood you cross US 34.
I-29 then reaches Council Bluffs, a small town opposite the larger city of Omaha in Nebraska. On the south side of the town of Council Bluffs, I-29 with Interstate 80 is double-numbered, which is a fairly large stretch of highway with parallel carriageways and main carriageways, with I-29 formally running over the parallel carriageways. I-29 then passes west of Council Bluffs and separates the city from the Missouri River. The passage through Council Bluffs has 2×2 lanes throughout. There is an interchange with Interstate 480.
Just north of Council Bluffs, Interstate 680 joins, then exits the urban area and I-29 re-enters agricultural land. Another 15 kilometers north, Interstate 880 turns east, followed by a 120-kilometer stretch through rural areas to Sioux City. I-29 continues here through the Missouri River valley, a flat and sparsely populated area. At the town of Missouri Valley one crosses the US 30, because of the route parallel to the Missouri River, however, few east-west routes are important.
One then reaches Sioux City, a small city on the border with both Nebraska and South Dakota. I-29 runs directly over the bank of the Missouri River here. On the south side of Sioux City there is an interchange with Interstate 129, which also crosses US 20. I-29 takes the final section through Sioux City from east to west, then crosses the Big Sioux River, which forms the border with South Dakota. Interstate 29 in South Dakota then continues to Sioux Falls.
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I-29 at Sioux City in 1965. The situation here has changed beyond recognition. The bridge over the Missouri River was replaced in 1981, including a flyover over the connection with I-29. The flyover was demolished again in 2012. I-29 was reconstructed in 2017.
As elsewhere in Iowa, construction of I-29 got off to a good start after the creation of the Interstate Highway system in 1956. As early as 1958, the first two sections were opened, the route through western Sioux City, and from Council Bluffs to Missouri Valley. The route through Sioux City was already completed in 1960. Construction slowed down after 1962, especially the route through Council Bluffs was built slowly. The highway between Council Bluffs and the North Dakota border was completed in 1967. Construction south of Council Bluffs followed a little later. Council Bluffs completed the route in 1972, and the last section opened to traffic in December 1972, between the Missouri and Thurman border. This completed I-29 in 14 years in Iowa.
|Exit 148||Exit 151||5 km||01-10-1958|
|Exit 57||Exit 75||29 km||26-11-1958|
|Exit 127||Exit 143||26 km||28-11-1959|
|Exit 143||Exit 148||8 km||15-07-1960|
|Exit 112||Exit 127||24 km||26-10-1961|
|Exit 75||Exit 112||59 km||07-12-1967|
|Exit 53||Exit 57||7 km||25-10-1968|
|Exit 42||Exit 1 (I-80)||13 km||22-12-1969|
|Exit 1 (I-80)||Exit 52||3 km||01-11-1970|
|Exit 32||Exit 42||16 km||04-12-1971|
|Exit 52||Exit 54||2 km||10-11-1971|
|Exit 20||Exit 32||19 km||10-12-1971|
|Exit 10||Exit 20||16 km||01-12-1972|
|Exit 1||Exit 10||14 km||15-12-1972|
|Exit 0||Exit 1||2 km||31-08-1973|
Verbreding in Sioux City
I-29 has been completely redeveloped by Sioux City with 2×3 lanes in the period 2008-2019. A total of 10 miles of I-29 has been widened between Sergeant Bluff, where the Sioux City airport is located, and the final exit in Iowa. The work was mainly carried out along the center of the Sioux City complex, which was the last to be carried out. The widening took a total of 11 years and was completed in December 2019. The project cost $400 million.
Reconstruction in Council Bluffs
Interstate 29 along the south side of Council Bluffs has been reconstructed in phases. This part coincides with I-80. The freeway has been widened to 2×3 continuous lanes, plus parallel lanes for local traffic. In addition, the traffic flows on the double-numbering with the I-80 are untangled. A cross section of 4×3 lanes on the I-29/80 double numbering has been realized. The nodes have also been reconstructed. The entire project cost $2 billion. The project has been phased in and ran from 2006 to August 2021. On October 10, 2014, the redesigned western interchange between I-29 and I-80 opened. On October 19, 2017, the redesigned eastern interchange between I-29 and I-80 opened.
|Missouri state line||13.000|
|Exit 35 Glenwood||23.000|
|Exit 47 Council Bluffs||35.400|
|Exit 48 (east)||67.600|
|Exit 49 Council Bluffs||82.300|
|Exit 51 (west)||40.100|
|Exit 56 Council Bluffs||17.200|
|Exit 75 Missouri Valley||14.000|
|Exit 95 Little Sioux||13.200|
|Exit 112 Onawa||13.600|
|Exit 141 Sergeant Bluff||37.000|
|Exit 147 Sioux City||40.400|
|South Dakota state line||34.600|
|Exit 1||Exit 48||2×2|
|Exit 48||Exit 51||4×3||Council Bluffs|
|Exit 51||Exit 141||2×2|
|Exit 141||Exit 149||2×3||Sioux City|
|Exit 149||Exit 151||2×2|