A series of slip road closures on the M27 are due to start on October 15.
National Highways says essential carriageway work will be carried out between junctions 5 and 8.
A spokesperson said: "The main focus of work will involve the closure of junction 7 of the M27 eastbound exit for an extended period.
"This is to allow us to install new low noise asphalt and raise the gradient of the slip road by 180mm to ensure it matches the new motorway surface."
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The eastbound exit slip road at junction 7 will be closed between 9pm on October 15 and 6am on October 19.
The eastbound entry and exit slip roads at junctions 5 and 7, and the eastbound exit slip road at junction 8, will be closed 9pm-6am from October 15-18.
The eastbound entry and exit slip roads at junction 5, the eastbound exit slip road at junction 7, and the eastbound exit slip road a junction 8 will be closed 9pm-6am from October 19-27.
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