This SIU begins at the Kentucky/Tennessee border in Fulton, and closely follows US Highway 51 to Dyersburg. The stretch between Dyersburg and Troy is at Interstate Highway standards—opening with the completion of Interstate 155 west of Dyersburg. An additional stretch north of Union City to within 1100 feet of the Kentucky border is also a freeway. Thus, the vast majority of the work on SIU 7 will involve bypassing the portion of US-51 between Troy and Union City (where it is currently a 4-lane surface arterial with at-grade intersections) and redesigning the US 51/US 45 interchange in South Fulton. This stretch has been divided into five smaller sections. The first two sections make up the Troy Bypass, while the northern three sections represent the Union City Bypass.