National Highways have put a warning out for drivers as they expect high volumes of traffic due to the Devon County Show.
The M5 around junctions 30 and 31 near Exeter may be particularly busy.
Devon Alert posted on X that congestion will be expected on and around Sandygate and Clyst St Mary roundabouts.
The A3052, A376 and A379 will also be busy for the duration of the show.
National Highways ask drivers to leave plenty of time for journeys over the weekend.