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|direction_b=East |terminus_b= at the Mississippi River |counties=Scott |previous_type=US |previous_route=71 |next_type=US |next_route=75 }} Interstate 74 (I-74) is the central freeway through the Iowa Quad Cities. It roughly divides Davenport to the west and Bettendorf to the east. The Interstate Highway begins at an interchange with Interstate 80 (I-80) at the northeastern edge of Davenport and continues into Illinois at the Mississippi River by crossing the I-74 Bridge. The freeway was built in stages during the late 1960s and early 1970s. The northern half of the interstate was built atop farmland in northeastern Davenport, while the southern half was built near the existing U.S. Route 6 (US 6) corridor through Bettendorf. After the approaches to the Iowa-Illinois Memorial Bridge were rebuilt for interstate traffic, it was completed and opened to traffic on November 26, 1974. The Iowa and Illinois departments of transportation are planning a major reconstruction project along I-74. The corridor will be widened from four lanes to six. A new river crossing will be built to replace the aging bridges. Eastbound motorists on I-80 wishing to use I-74 east of the Quad Cities are suggested to use I-80 east around town for this reason. ==Route description== I-74 begins at a trumpet interchange with I-80 on the northern edge of Davenport where it heads to the south. From I-80 to the East 67th Street overpass, the freeway is surrounded by farmland on either side. South of the overpass, it passes a residential area to the east and a commercial area to the west. The East 53rd Street exit provides access to shopping centers on both sides of the interstate. Continuing south between East 53rd Street and Spruce Hills Drive, I-74 goes through an area of sparse development. What businesses there are have frontages on either Elmore Avenue to the west or Utica Ridge Road to the east; the backs of these businesses abut the freeway.〔 At the Spruce Hills Drive exit, U.S. Route 6 (US 6) joins from the west. Nearly to the west, Spruce Hills Drive becomes Kimberly Road, which carries US 6 through Davenport until it intersects I-280 on the western edge of the Quad Cities. South of Spruce Hills Drive, I-74 runs parallel to the eastern leg of Kimberly Road, which turned south at its intersection with Spruce Hills Drive. The freeway curves slightly to the southeast and enters Bettendorf. It crosses Duck Creek and meets Middle Road at a diamond interchange.〔 As I-74 and US 6 head down a hill towards the Mississippi River, a series of exit and entrance ramps connect the freeway to US 67, which runs northbound along State Street and southbound along Grant Street. The interstate passes over US 67 and railroad tracks belonging to the Dakota, Minnesota and Eastern Railroad on an elevated highway, which serves as the approach to the Interstate 74 Bridge over the Mississippi River. Despite the singular name, the crossing is actually two twin bridges which each carry one direction of traffic to and from Moline, Illinois.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Interstate 74 in Iowa」の詳細全文を読む スポンサード リンク
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