The sheer volume of traffic has led to slow-moving queues on the northbound M6 between Charnock Richard Services and the Broughton Interchange at junction 32 (M55/Blackpool/Fleetwood).
Traffic monitoring services say travel time is around an hour along the stretch of M6 from Leyland to Forton Services near Lancaster.
All lanes are open and no crashes have been reported this afternoon.
Highways England said congestion and delays is likely due to the sheer volume of holiday traffic heading north to the Lake District It said it expects congestion to ease by 3pm.
The agency tweeted: "Please be aware that there are long delays on the M6 northbound between J27 and J31 in Lancashire.
"Average journey times are now 45 minutes longer than normal for this time of day, with 10 miles of slow moving traffic.
"There's also long delays on M61 between J8 and the M6."
Support us and become a subscriber today. Enjoy unlimited access to local news, the latest football stories and new puzzles every day.
With a digital subscription, you can see fewer ads, enjoy faster load times, and get access to exclusive newsletters and content. Click here to subscribeMore to follow...