I-35
Begin	Lamoni
End	Northwood
Length	218 mi
Length	351 km
Route Missouri → Kansas City4 Lamoni 12 Leon 18 Grand River 22 Van Wert 29 Knox Township 33 Osceola 34 Clay Street 36 Osceola 43 New Virginia 47 Truro 52 St. Marys 56 Indianola 65 → Des Moines Beltway 69 West Des Moines 70 George Mills Civic Parkway 72 → Omaha 125 Adel 126 Urbandale 127 Grimes 128 100th Street 129 Camp Dodge 131 Saylorville Lake 135 Polk City 136 Ankeny 137 → Davenport 89 Corporate Woods Drive 90 Bondurant 92 1st Street 96 Polk City 102 Huxley 111 Marshalltown 113 Ames 116 Milford Township 123 Howard Township 124 Story City 128 Stanhope 133 Jewell 139 Chambers 142 → Fort Dodge / Waterloo 144 Williams 147 County Road D20 151 Woolstock 159 Dows 165 Clarion 170 Alexander 176 Sheffield 180 Thornton 182 Rockwell 188 Burchinal 190 → Mason City 193 Clear Lake 194 Mason City 197 County Road B20 203 Manly 208 Joy 214 Lake Mills Minnesota → Minneapolis

Interstate 35 or I -35 is an Interstate Highway in the U.S. state of Iowa. The highway runs north-south across the state, from Lamoni on the Missouri border through the state capital Des Moines to Northwood on the Minnesota border. The highway is 351 kilometers long.

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Travel directions

Southern Iowa

Just south of Lamoni, Interstate 35 in Missouri enters the state of Iowa. US 69 runs parallel to the highway. The landscape in this part of Iowa is slightly hilly, with small forests and meadows. The highway runs due north, and the rest of the road network isn’t as tightly gridded here as in other parts of the state. At Osceola one crosses US 34, which runs from Creston in the west to Ottumwa in the east, both small towns with a regional function. The highway has 2×2 lanes, and is quite quiet, due to the lack of larger towns in the area. From time to time there are exits to small villages and intersecting secondary roads. After about 100 kilometers you reach the capital Des Moines.

Monks

I-35 at Des Moines.

I-35 here forms the bypass of Des Moines, the capital of Iowa, and has a population of 199,000 and an agglomeration of 600,000 inhabitants. The region is growing rapidly. The first interchange follows on the southwest side of the city, with State Route 5, the city’s southern and eastern bypass. You will then enter the urban area with 2×2 lanes. The first suburb is West Des Moines, which has a population of 52,000. Then you come to a cloverleaf, where Interstate 80 merges with I-35, which comes from Omaha. Interstate 235 also begins here, which runs through downtown Des Moines. I-35 and I-80 are provisionally double-numbered here and form the northern bypass. The highway then has 2×3 lanes, and you soon cross US 6, which runs parallel to I-80. I-35/I-80 then turns east, passing the northern suburb of Urbandale.

One then crosses the River Des Moines, a medium-sized river. At the northeast end of Des Moines, you come to an interchange where I-80 continues straight toward Davenport and Chicago, while I-35 turns north toward Minneapolis. From the south, I-235 ends here again. One then passes with 2×3 lanes along the last suburb, Ankeny. After this, the road narrows to 2×2 lanes, continuing north through the countryside.

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Northern Iowa

I-35 in Northern Iowa.

Here, too, US 69 runs parallel to the highway, passing through a somewhat flatter area. In winter, dangerous driving conditions can already occur here, with snow storms. At the height of the town of Ames you cross the US 30, which has been expanded here as a highway. US 30 runs from Denison in the west to Marshalltown and the larger city of Cedar Rapids in the east. The road network here is built in a grid pattern of 1 by 1 mile. The landscape here is a lot more barren than southern Iowa. Near the village of Williams one crosses US 20, a highway from the larger towns of Sioux City and Fort Dodge in the west to Waterloo, Cedar Rapids and Dubuque in the east, all larger towns of importance.

I-35 has many long straights, and driving can be quite monotonous. At Mason City, a somewhat larger town in the north, you cross the US 18, which has also been developed as a highway here. US 18 runs from Spencer in the west to Charles City and Prairie du Chien in the east, all small towns in northern Iowa and Wisconsin. Just past Northwood, one crosses the Minnesota border, and Interstate 35 continues in Minnesota to Minneapolis and Saint Paul.

History

Construction began expeditiously from the creation of the Interstate Highway system initially. The first section opened in 1958 in western Des Moines and by 1960 was a fairly long stretch from Osceola to where the interchange with I-35/I-80 is in eastern Des Moines. The urban route had already been completed. After that, construction was halted for half a decade, as priority was given to the construction of Interstate 80.

In 1966, the first section opened north of Des Moines to Ames, which was extended to Webster City in 1968. The southernmost section between the Missouri border and Osceola was completed in 1970, and the northernmost section between Clear Lake and the Minnesota border followed in late 1972. Then there was a fairly long missing link between Webster City and Clear Lake of almost 80 kilometers. This section was finally opened in November 1975, completing I-35 through Iowa.

Arrange

Only around Des Moines, portions of I-35 have been widened. The first section to be widened was I-35/80 on the west side of Des Moines, which was believed to have been widened to 2×3 lanes as early as the 1980s. Between the late 1990s and 2002, I-35/80 was widened to 2×3 lanes along the north side of Des Moines. In the period 2002-2004, I-35 was widened to 2×3 lanes from Des Moines to Ankeny. In 2013, I-35 in southwest Des Moines was widened to 2×3 lanes between IA-5 and I-80. Later in 2014, I-35 was widened to 2×3 lanes further south into Warren County, beyond the built-up area of ​​Des Moines.

Opening history

Van	Unpleasant	Length	Datum
Exit 65	Exit 126 (I-80)	18 km	21-09-1958
Exit 56	Exit 65	14 km	05-10-1958
Exit 126 (I-80)	Exit 131 (I-80)	8 km	09-11-1958
Exit 36	Exit 56	32 km	26-11-1958
Exit 131 (I-80)	Exit 136 (I-80)	8 km	26-11-1958
Exit 33	Exit 36	5 km	30-08-1960
Exit 136 (I-80)	Exit 138 (I-80)	3 km	17-11-1960
Exit 87	Exit 111	38 km	11-11-1965
Exit 111	Exit 142	50 km	06-12-1967
Exit 12	Exit 33	34 km	17-12-1969
Exit 0	Exit 12	19 km	02-12-1970
Exit 192	Exit 203	21 km	07-08-1971
Exit 203	Exit 218	24 km	12-12-1972
Exit 142	Exit 192	80 km	14-11-1975

Traffic intensities

The I-35/I-80/I-235 interchange on the east side of Des Moines.

Location	2014
Missouri state line	12.200
Exit 12 Decatur City	13.200
Exit 22 Van Wert	14.000
Exit 33 Osceola	16.100
Exit 56 Martensdale	22.600
Exit 68 IA-5	48.000
Exit 70 Des Moines	64.200
Exit 72 (west)	93.900
Exit 124 Des Moines	111.000
Exit 125 Des Moines	108.700
Exit 127 Des Moines (IA-141)	88.000
Exit 135 Des Moines (IA-415)	87.000
Exit 88 (east)	73.100
Exit 92 Ankeny	50.500
Exit 102 Huxley	41.300
Exit 111 Ames	31.100
Exit 124 Story City	24.600
Exit 142	17.100
Exit 165 Coulter	14.700
Exit 190	19.100
Exit 194 Clear Lake	18.700
Exit 203 Hanlontown	18.400
Minnesota state line	17.600

Lane Configuration

Van	Unpleasant	Lanes	Comments
Exit 0	Exit 56	2×2
Exit 56	Exit 92	2×3	Monks
Exit 92	Exit 214	2×2