Drivers planning to use the M1 and A43 in the East Midlands are being warned to allow extra time as the MotoGP gets underway at Silverstone today.
The Highways Agency are warning that roads on the way to the race circuit will be busy throughout the weekend.
More than 55,000 people are expected on Sunday, the final day of the event.
More top news
Celebrations to mark the opening are underway after the two-and-a-half-year renovation.
See some of the spectacular videos sent in by viewers who filmed the lightning storms last night.
The second day of Coventry's Godiva Festival could see tens of thousands of visitors to the War Memorial Park for its 17th year.