According to the RAC, traffic is expected to be busy on Good Friday, although levels are likely to be consistently high from later on Thursday, when many schools break up.
Drivers are being advised to set off early, as major roads are expected to be busy from 10:00 BST on Good Friday and Saturday and Easter Monday.
In a bid to ease congestion, National Highways plans to lift 1,500 miles of roadworks over the Easter period.
The RAC said journey times on the M5 southbound between junction 15 at the Almondsbury Interchange and junction 23 for Bridgwater could be extended by more than 50 minutes at lunchtime on Good Friday.
It is also predicting delays of over an hour between junction 25 for Taunton and junction 15 at midday on Easter Monday, as motorists return from their Easter trips.
