In July 2009, General Motors and the U.S. Army officially opened GM's test facility in the southwest on the Army's Yuma Proving Ground. The opening marked the end of most construction activity and the beginning of a cooperative arrangement hammered out 2 years ago. The agreement will provide GM with a suitable test facility following the closing of their long standing Mesa Proving Ground. In the agreement GM has leased a portion of the Yuma Proving Ground from the government on which several test roads and support facilities have been built. Both the Army and GM will have access to road systems they currently did not have on their property. A win – win for both groups.