A rolling road block is causing delays on the M61 in Chorley as emergency repairs are made to a large pothole.
Traffic officers are carrying out the road block between southbound junctions 8 (Chorley) and 6 (Bolton North, Horwich).
Maintenance workers have been tasked with making urgent repairs to a large pothole in the carriageway.
The road block will allow traffic to keep moving, but at a reduced speed of 20mph.
Matrix signs have been activated on the motorway advising drivers to approach with caution.
The rolling road block is expected to last until around 9.15am.