The M6 southbound is closed between Junction 7 for Great Barr and Junction 6 for the A38 near Birmingham.
It is hoped the carriageway will be reopened by 7am with a diversion in place.
Elsewhere on the M6, congestion is building at Junction 8 for the M5.
A spokesman for National Highways said: "Our contractors are working hard to complete the works, and expect to have the road re-open by 7am.
"A signposted diversion route is in place.
"If this closure impacts on your planned route, please allow extra journey time. Plan ahead, you may wish to re-route or even delay your journey.
"Further information is available from National Highways by visiting our trafficengland.com website and travel apps, or via our regional twitter feed.
"Our 24/7 contact centre team is also available to provide up to the minute information on 0300 123 5000."
The #M6 southbound is CLOSED between J7 (#GreatBarr) and J6 (#A38M) near #Birmingham due to planned roadworks overrunning their pre-agreed end time.— National Highways: West Midlands (@HighwaysWMIDS) March 27, 2023
For further information, please head over to: https://t.co/XGUNAb2ook pic.twitter.com/K22zDtUqLp
#M6 southbound within J8 (M5) - Congestion - Full details at https://t.co/nkWL91Ro1g (Updated every 5 minutes)— Live Traffic - M6 (@Traffic_M6) March 27, 2023