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Toyota is set to expand its massive vehicle testing site around 50 miles northwest of Phoenix in the town of Wittman.

Toyota is investing $50 million to improve its vehicle testing site in Wittman and has already broken ground on construction of a new oval track, an off-road park and other enhancements.

Toyota said it will expand the Arizona Proving Grounds and invest more than $50 million to enhance vehicle testing at the facility in Wittmann.