Silverstone managing director Richard Phillips issued an "unreserved apology" to fans after the traffic mayhem that almost reduced him to tears.
Thousands of fans were left stranded in traffic jams outside the Northamptonshire track on Friday as the first two practice sessions ahead of Sunday's British Grand Prix unfolded under constant rain and reduced car parks to quagmires.
It has resulted in Silverstone losing 50% of parking space due to the damage caused, and in turn they are now asking fans with tickets for public car parks on Saturday to not turn up.
Phillips concedes the financial hit will likely run into seven figures.
The circuit has issued information for people planing on coming to Silverstone tomorrow.
Grand Prix fans are being told to stay away from the Silverstone race track today.