The M49 will be closed overnight every day this week.
The southbound carriageway will be shut from 8pm-6am.
This is to allow bridge joints over the Severn Tunnel to be replaced.
Work is being carried out overnight to minimise disruption and Highways England has apologised for the inconvenience.
Drivers will be diverted via the M4 Junction 22 eastbound, onto the M5 Junction 20 southbound and the exit at Junction 18a.
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