I-69 has been divided into a number of sections of independent utility.
SIU 9 (Mississippi portion)
At the Mississippi-Tennessee state line, I-69 enters Mississippi from the north concurrently with Interstate 55, and follows the previously constructed route of I-55 south to Hernando, Mississippi for approximately, where it meets Interstate 269. On January 18, 2008, the Federal Highway Administration authorized the states of Mississippi and Tennessee to extend I-69 from the I-40/TN 300 interchange in north Memphis to the I-55/I-69 interchange in Hernando; in late May 2008, Mississippi began posting signs reflecting the extension of the route. Tennessee signed I-69 along I-55 north to I-240 for a few months and then removed the I-69 shields.
SIU 10
Segment 10 of the I-69 extension was originally planned and built as part of the MS-304 relocation project to link the Tunica County casinos to Interstate 55. Planning of the MS-304 Bypass predates I-69 planning in Mississippi, and federal and state officials opted to route I-69 over this segment in 2000, since it was nearing the start of construction. It also eliminated the need for constructing a new highway while still accomplishing the intended goals for the I-69 corridor. In Hernando, I-69 diverges from I-55 at the interchange with Interstate 269 and turns west for approximately to the area around the Tunica County casinos. A ribbon-cutting ceremony took place at 2:00 p.m. CST on October 3, 2006, at which point the road was opened to traffic. This segment's opening also coincided with Mississippi's Statewide Transportation Conference, held in Tunica. The state's HELP program, with funding raised from Tunica County's casino gaming revenues, enabled this segment to be completed three years ahead of schedule. This portion of I-69 mostly coincides with the relocated route of MS 304; both routes are co-signed between I-55 and the MS 713 spur, where the two routes split: MS 304 continues due west to U.S. 61, while I-69 turns south to connect to the old routing of MS 304 near Banks, Mississippi. The MS 713 portion of the route opened to traffic December 18, 2006. I-55 and I-69 meet at a cloverleaf interchange near Hernando; with I-269 and MS-304 continuing to the east. To accommodate the volume of traffic anticipated to pass through this interchange and meet current Federal Highway Administration standards for cloverleaf interchanges, collector/distributor roads were added to the I-55 mainline in the vicinity of the interchange. As of December 18, 2006, all work on SIU 10 is complete and the entire segment is open to traffic. Because Interstate 69 is still incomplete through the remainder of Mississippi, exits are unnumbered on the Hernando-Tunica segment. The two control cities used on the SIU 10 segment are Memphis and Tunica, although the route does not yet reach the Town of Tunica. The additional control city of Southaven is used at the interchange with I-55 and I-269 along the northern duplex.
Future
SIU 11
Continuing south from its present terminus at Mississippi Route 3 near Banks, I-69 will bypass the Town of Tunica to the east, then veer to the west and merge with U.S. 61 route to Clarksdale, also merging with U.S. Route 49 near Rich. In 2006 MDOT decided to incorporate the recently completed Clarksdale Bypass into the future I-69 alignment through the Clarksdale vicinity, since the bypass is already at Interstate standards. In Clarksdale, I-69 will merge with U.S. Route 278 and continue south, serving Shelby, following the existing U.S. 61 route. I-69 and U.S. 278 will diverge from U.S. 61 near Merigold, bypassing Cleveland to the west, and continue south to near Shaw, then west to Benoit where it will intersect Mississippi Highway 1. The FinalEnvironmental Impact Statement for SIU 11 was approved in August 2010, and the Record of Decision was issued in September 2010. Due to funding issues, no major construction on this section of I-69 is expected through at least 2019, although some spot upgrades are planned on sections of US-61 that I-69 will eventually overlap. The 2016–2020 Statewide Transportation Improvement Plan published by the Mississippi Department of Transportation anticipates construction to begin in 2020 to upgrade a 6-mile section of US-61 to I-69 from the north end of the Clarksdale Bypass to near Swan Lake. The 2017–2020 STIP released by MDOT in December 2016 includes $3 million in FY-2017 for engineering and design work on the northernmost section of SIU-11 from the south end of the existing I-69 freeway at MS-3 and MS-713 to Arkabutla Dam Road.
SIU 12 (Mississippi portion)
From Benoit, I-69 and U.S. 278 will cross the Charles W. Dean Bridge over the Mississippi River into Arkansas. Mississippi's portion of SIU 12 consists of the eastern end of the Dean Bridge; Arkansas' portion will continue from the Dean Bridge to U.S. 65 near McGehee. Environmental studies for this segment, including the Dean Bridge, have been completed and the FHWA issued a Record of Decision approving the route through SIU 12 in 2004. SIU-12 and the Dean Bridge are considered "shovel ready," pending the availability of funding and completion of right-of-way acquisition for the Mississippi approach to the bridge.
