CUMMING -- A quick drive down Buford Highway heading east from Cumming will provide a display of car dealerships popping up along the commuter corridor, and now drivers of one of the most popular brands in the area have one of their own. Nalley Nissan of Cumming is now open to customers out of its 44,000-square-foot full-service facility at 1310 Buford Highway. “Every single day we are here we start to see traffic pick up,” said Dan Clara, managing marketing director of Nalley and Greenville Automotive Groups.