General Motors operates several proving grounds.
General Motors Desert Proving Ground in Yuma County, Arizona
Aerial photograph of the GM proving grounds in Milford, Michigan
Milford Proving Ground main gate, General Motors Rd.
Opel test track in Dudenhofen
Ford Proving Grounds
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Ford Motor Company operates several proving grounds worldwide, for development and validation testing of new vehicles.
General Motors proving grounds
…Fiorano Circuit (Ferrari) Ford Proving Grounds Mazda Proving Grounds…
Aerial view of the Ford Arizona Proving Ground
Aerial view of the Dearborn Development Center