Two driverless vehicles, in orange, equipped with laser scanners and cameras that work in concert to detect and help avoid obstacles, travel on the Shanghai Expo site to attend the official celebration of their arrival Thursday Oct. 28, 2010 in Shanghai, China. A team of Italian engineers launched what has been billed as the longest-ever test drive of driverless vehicles: a 13,000-kilometer (8,000-mile), three-month road trip from Italy to China. (AP Photo)

Photo by: Str

Two driverless vehicles, in orange, equipped with laser scanners and cameras that work in concert to detect and help avoid obstacles, travel on the Shanghai Expo site to attend the official celebration of their arrival Thursday Oct. 28, 2010 in Shanghai, China. A team of Italian engineers launched what has been billed as the longest-ever test drive of driverless vehicles: a 13,000-kilometer (8,000-mile), three-month road trip from Italy to China. (AP Photo)