metropolitan area, and Quad Cities. The majority of the highway runs through farmland, yet roughly a third of Iowa's population live along the I-80 corridor. Western Iowa I-80 enters Iowa on a bridge over the Missouri River, where it leaves Omaha, Nebraska, to enter Council Bluffs. Almost immediately after landing on the Iowa side of the bridge, it meets I-29 and US 6 at a Y interchange. At the interchange, I-80 splits into a local–express lane configuration. The inner express lanes do not provide any connection to I-29 nor to any of the intermediate interchanges between the two junctions with I-29. The outer local lanes are concurrent with I-29 through southern Council Bluffs for . The speed limit through this section is . The South 24th Street interchange serves a commercial area anchored by the Mid-America Center and Horseshoe Casino. The South Expressway exit, which previously marked the southern end of Iowa Highway 192 (Iowa 192), is adjacent to a big-box store commercial center. At the East System interchange in Council Bluffs; I-29 heads south while I-80 and US 6 head to the northeast. East of the I-29 split, I-80 travels northeast for the next . It passes through eastern Council Bluffs where it serves a commercial/residential area. At exit 8, US 6 exits the freeway and heads west. The Interstate leaves Council Bluffs and speed limit increases to . Here, I-80 roughly follows the course of Mosquito Creek past Underwood and Neola, both of which are served by interchanges. About of Neola, I-80 curves to the east as it meets the eastern end of I-880 at a directional T interchange. For the next , I-80 runs in more or less a straight line. Interchanges occur at regular intervals; of Pottwattamie and Cass county farmland separate each exit from the next. Near Avoca, it crosses the West Nishnabotna River and meets US 59. East of the interchange, the Interstate crosses the eastern branch of the West Nishnabotna River. As I-80 approaches the area north of Atlantic, there are three interchanges, Iowa 173, County Road N16 (CR N16), and US 71, which serve the western, central, and eastern parts of the city, respectively. Iowa 173, which serves Atlantic by way of Iowa 83, also connects to Elk Horn and Kimballton. US 71, which continues north toward Carroll, carries US 6 traffic to the Interstate. At this point, US 6 begins the