An orange barrel alert will slow traffic on one of Mid-Michigan's busiest highways.
It's interstate 94 between the Jackson-Calhoun county line and airport road near Jackson.
Beginning Monday, there will be nighttime single-lane closures for shoulder upgrades, but that's just the prep work for the main event beginning after Memorial Day.
The big job will be the repair work to nine bridges over the highway.
M-DOT says the work will be done in stages to cut down the impact on traffic.