To Reach 4540 Hastings Drive In Cumming, Georgia, From Ga-400, Head North Until You Reach Exit 14A. Take The Exit Toward State Route 20 East (Buford Highway) And Merge Onto The Highway. Continue For A Short Distance, Then Turn Right Onto Windermere Parkway. Follow Windermere Parkway And Turn Left Onto Hastings Drive. Continue On Hastings Drive Until You Arrive At 4540 Hastings Drive On Your Right.