A record 23.7 million drivers are expected to hit the roads on Friday December 20 making it the busiest day on the roads over the festive period.
And, according to The AA, one of the busiest traffic hotspots will be the M4/M5 just over the Severn at Almondsbury, near Bristol.
Also on the list of busy areas on December 20 is the M4 around Newport and Cardiff.
The AA has revealed that most people will be staying local this Christmas and travelling less than 50 miles.
Chris Wood, AA Patrol of the Year, said: “With people driving fewer miles, it means there will be more localised congestion as record numbers head out on the roads this festive period. The best way to ensure hassle-free journeys is to plan them well.
“Check the traffic reports before you leave and try to travel when it’s quieter if you can, or consider taking a different route to beat the jams.”