Self-driving vehicles could begin tooling down a bustling Atlanta street full of cars, buses, bicyclists and college students, as the city vies with other communities nationwide to test the emerging technology. Atlanta would become one of the largest urban areas for testing self-driving vehicles if plans come together for a demonstration as early as September. Nationwide, 10 sites were designated last month as'proving grounds' for automated vehicles by the U.S. Department of Transportation. North Avenue is being eyed as a real-world proving ground for self-driving vehicles, one of several communities nationwide vying to be test sites for the emerging technology. They include North Carolina turnpikes, the eastern Iowa prairie and a Michigan site where World War II bombing aircraft were produced in a factory built by automobile pioneer Henry Ford.