Chris Evans' CarFest: Highways Agency warns of delays
A car and music festival hosted by Chris Evans is expected to cause delays for drivers in Hampshire.
About 15,000 people are expected at CarFest at Laverstoke Park Farm in Overton on an estate owned by former F1 World Champion Jody Scheckter.
Journey times may be affected along the A303, the A34 near Whitchurch, and the M3 junction 8 near Basingstoke, the Highways Agency (HA) said.
Texas and Razorlight will play at the event, held in aid of Children in Need.
Rob Keep, from the HA, said: "Road users are advised to check conditions before setting out and to leave extra time for their journeys if necessary, take regular breaks and have drinking water with them.
"Drivers should also ensure their vehicles are prepared for the journey, with plenty of coolant and fuel."
Mel Kendal, Hampshire County Council's executive member for environment and transport, said some roads would be one-way during the event.
He added: "Roads in the area are narrow and drivers should take appropriate care, drive slowly and be considerate for the local residents and other road users.
"Please follow any directions given by the police or traffic officers."
Organisers of CarFest have described it as "a decidedly family-friendly show for car-lovers".
A spokesman said: "Evans has also expressed a desire for a practical and affordable classic car element to be included, giving the event an 'every enthusiast' appeal.
"Evans' love of exotic Italian supercars, classic and modern is no secret, and it's likely they'll feature in the proceedings."