Frustrated drivers on the M62 took to the hard shoulder during heavy traffic.
Congestion built up between junctions 22 and 23 eastbound last night because of a full closure for planned works between junctions 23 and 24.
"This is compounded by people thinking it is acceptable to drive on the hard shoulder," the agency said in a tweet. "This is for emergency use only."
Details of such drivers are always passed on to West Yorkshire Police's Roads Policing Unit, the agency added.