The shortest way to get there isnt to take the hwy. Theres a faster way but it takes backroads and if you dont know where youre going its confusing. The best way to take coming from gwinnett is take 85 south get off jimmy carter make a right, take that all the way down (like atleast 15 mins) then you will see 400 make a right onto 400 north and then get off exit 8 which is mansell rd make a left go down a few lights and make a right onto alpharetta hwy and andretti's will be on your left. Trust me thats the best way to go. Dont take exit 7 take exit 8