And about 11 percent will fly, down slightly, the automobile club said.
The trophy could be won in a race between automobile clubs from different countries.
The period can be extended for a further six months through the Automobile Club.
As the car gained in popularity local automobile clubs were founded.
The Automobile Club has long endorsed evening construction, but that could cause surprises.
And several drive-in owners said automobile clubs tended to plan meetings there without telling them.
Fortunately there were no disasters other than the roof and first floor damage to the Automobile Club's building next door.
The Automobile Club agreed there had been an improvement.
The national survey was taken about a week before the study by the Automobile Club of Hartford, which found an average 11-cent increase.
For years, the Automobile Club has opposed any increase as unduly punitive to drivers.
