Part of the the M6 southbound was being shut for resurfacing overnight after a lorry fire, Highways England said.
The fire broke out early on Tuesday and has closed the southbound carriageway between junction two for the M69 and junction one at Rugby.
Specialist teams were sent to the scene to recover the lorry trailer that had been carrying a "hazardous substance".
Highways England said its officers were doing remedial work "as fast as possible" to prepare for peak times.
It added in a statement there would be a full closure for resurfacing on Tuesday night.
Motorists were being advised to take the "hollow triangle" for the diversion route; exiting at junction two on to the M69 northbound to junction one, then on to the A5 eastbound to the A246 junction, travelling southbound to rejoin the M6 at junction one.
#M6 southbound between J2 and J1 remains closed for remedial repairs to take place. Further images from scene show our crews working hard to get the carriageway re-open. Approx. 2 mile of congestion on approach to the closure. Diversion route info here: https://t.co/Pv8hRRWyuQ pic.twitter.com/166VAdhtiT— Highways England (@HighwaysWMIDS) November 5, 2019
Follow BBC West Midlands on Facebook, on Twitter, and sign up for local news updates direct to your phone.