Motorcycle racing fans heading to this year's British MotoGP have been urged to ignore their sat-navs as they approach Silverstone Circuit.
National Highways said they should follow event signage instead on the routes leading to the south Northamptonshire venue.
People planning on using roads in the area have been warned to allow extra time for their journeys, from Friday to Sunday.
Bikers have also been reminded to take regular breaks if they are making long journeys to the race meeting.
About 78,000 people are expected at the circuit across the weekend, and National Highways said it would have traffic officers in the area over the three days to "make sure journeys are as safe and smooth as possible".
Its operations manager, Mark Munnoch, said: "Visitors should check their ticketing information and follow the event signage rather than their sat-navs when approaching the circuit, to make sure they get to the parking areas smoothly."
Silverstone has staged every MotoGP since 2010 after plans to move it to the Circuit of Wales never materialised, with the track never being built.
Practice takes place on Friday, with practice and qualifying on Saturday.
The 20-lap race gets under way at 13:00 BST on Sunday, with other races also scheduled across the weekend.
