High Quality Content by WIKIPEDIA articles! 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.