A $400 million ‘Big Fix’ is coming to Jackson-area interstates. What drivers should expect
Mississippi drivers should expect more than two years of changing traffic patterns around Jackson as the Mississippi Department of Transportation moves toward a planned “Big Fix” rehabilitation project in September 2026.
The roughly $400 million project covers about 16 miles of I-20 and I-55 in Hinds and Rankin counties, along with related work on I-220, U.S. 51, South Gallatin Street, ramps, frontage roads and connecting routes. The work includes rehabilitation or repair of 36 bridges, a reported 121 lane miles of roadway scope and new traffic-management technology.
About 110,000 vehicles travel through the affected area each day, according to MDOT officials quoted by Mississippi Today. The project will therefore affect more than Jackson-area commuters: Freight operators, emergency responders, businesses and travelers using the corridor will also have to adjust as work advances.
What happens first
Construction is scheduled or expected to begin in September 2026, but MDOT’s proposed-project schedule says letting dates and project details can change. Single-lane overnight closures are expected to begin in October, with most work planned for nighttime hours and weekends to limit daytime disruption.
The project is expected to last about two and a half years. Public estimates put completion toward the end of 2028 or possibly early 2029, rather than on one guaranteed date.
The two major I-20 closures
The most disruptive work is planned during two full directional closures of I-20:
- Summer 2027: I-20 westbound is expected to close for 45 days.
- Summer 2028: I-20 eastbound is expected to close for 45 days.
These are planned future closures, not current restrictions. MDOT expects traffic to move around Jackson using I-220 and I-55, but final detour routes and detailed traffic advisories have not yet been posted. Drivers, freight companies and emergency agencies should check MDOT updates as each closure approaches instead of relying on a preliminary route.
Where the work will occur
The central I-20 work extends from Wiggins Road in Jackson to just past the east end of the Pearson Road interchange in Pearl. The project also includes I-55 from McDowell Road to north of the High Street interchange, I-220 from I-20 to the Lynch Street bridges, and portions of U.S. 51 and South Gallatin Street.
MDOT’s procurement document includes cross streets, ramps and frontage roads within those corridors. The project crosses Hinds and Rankin counties.
What crews will do
The scope includes pavement rehabilitation, pavement removal and replacement in specified areas, bridge widening and repairs, bridge-deck work, shoulder and barrier improvements, drainage and slide repairs, guardrails, signs and pavement markings.
MDOT’s request for proposals also calls for intelligent transportation system work, including dynamic message signs, closed-circuit television cameras, fiber and wireless communications, traffic-management center modifications, power equipment and related cabinets.
The 121-lane-mile figure describes the reported roadway scope. It does not mean every lane will receive a complete resurfacing treatment.
How the project is being paid for
MDOT’s 2026-2028 three-year plan lists project 109486 as a 2026 Hinds and Rankin counties freight-corridor project with a $225 million programmed cost estimate for pavement and bridge rehabilitation from Wiggins Road to Pearson Road.
Separate reporting describes a broader nearly $400 million project financing plan that includes an $86.6 million federal INFRA grant and $90 million in state funds. The public estimate and the programmed amount are different figures, so the final construction cost and funding breakdown should not be treated as settled solely from the three-year plan.
MDOT’s proposed-project schedule, updated August 28, 2026, is explicitly a work in progress and subject to continuous revision. A scheduled letting or programmed funding entry is not the same as a completed construction authorization.
Why the delivery method matters
MDOT is using a Construction Manager/General Contractor, or CMGC, process. Under that approach, a contractor participates during design and constructability planning before the final construction price is established.
MDOT’s procurement document says construction services cannot begin until the agency accepts a guaranteed maximum price, the contract is amended to include construction services, the Transportation Commission approves that amendment and an appropriate notice to proceed is issued. That means the current schedule reflects an active delivery process, but it does not eliminate the remaining approval and pricing steps.
For residents, the practical takeaway is straightforward: Expect intermittent nighttime and weekend lane closures beginning in fall 2026, and plan for changing routes and potentially longer trips during the 45-day I-20 closures planned for summer 2027 and summer 2028. Businesses, emergency services and communities along I-20, I-55 and likely diversion routes will need to monitor MDOT advisories as the project moves from design into construction.
Sources
- Mississippi Department of Transportation Schedule of Proposed Projects
- Mississippi Today: MDOT plans ‘Big Fix’
- WLBT: MDOT announces $400 million project on I-20 in Jackson
Look for updates to this story
Discover more from Interactive News
Subscribe to get the latest posts sent to your email.