The Arizona Republic reports that Volvo, Nissan and Volkswagen are upgrading their Arizona proving grounds even as GM is selling off its test tracks. The article notes:
While General Motors and other car companies with proving grounds in the Valley sold thousands of acres to developers, anticipating ever-encroaching rooftops, Volvo went against the grain. It decided to stay and developed a $25 million plan to expand and upgrade its testing facility near Wittmann.
