Iowa Highway 330
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| Maintained by Iowa DOT | ||||
| Length: | 47.748 mi (76.843 km) | |||
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| West end: |
   I-80 / US 6 / US 65 in Altoona
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| East end: |
 Iowa 14 near Albion
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A 47-mile-long (76 km) state highway in central Iowa, Iowa Highway 330 runs northeasterly from Altoona past Albion, to just north of Marshalltown in Marshall County. Originally the two-lane, unpaved Iowa Highway 88 in the 1930s, and later Iowa Highway 64 until 1969, Highway 330 is now a four-lane divided expressway along much of its length. In conjunction with US 65, Iowa Highway 14 and U.S. Route 20, Iowa 330 is commonly used as a connector between Des Moines and the Waterloo/Cedar Falls area.
Iowa 330 begins at an interchange with Interstate 80 (I-80), U.S. Route 6 (US 6), and US 65 in Altoona. The I-80 freeway runs east–west; US 6 comes up from the southwest along Hubbell Avenue and joins eastbound I-80 while US 65 exits eastbound I-80 and turns onto Hubbell heading northeast. For the first 14 miles (23 km) of its routing, Iowa 330 shares the same roadway with US 65. The two routes head northeast on a four-lane expressway through Bondurant and into rural Polk County. In the northeastern corner of Polk County, the roadway breaks from its northeastern path to curve around the Engeldinger Marsh. The routes enter Jasper County and turn back to the northeast.
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