Looks like a little test track at that GM plant?
currently builds vehicles for GM’s Chevrolet, Cadillac, Opel/Vauxhall, and Holden divisions.
Interesting backstory on the Hamtrammck plant.
>>While some residents protested, others supported the efforts to build the new plant. Gary Campbell, a Poletown resident and bar owner, accused those opposing the new plant of presenting opinions of a small minority as if they represented the entire neighborhood. The controversy led to national news attention and the involvement of Ralph Nader and the Gray Panthers. Protests centered around the Immaculate Conception Roman Catholic Church. The regional Catholic Archdiocese supported the relocations and had already agreed to sell the two Catholic churches that were in the area. However, Joseph Karasiewicz, the priest at one of the parishes defied his local Cardinal and fought to keep his building from being sold. The Archdiocese stood firm in its support of the sale. A 29-day sit-in at the Immaculate Conception Church came to an end on July 14, 1981 when police forcibly evicted 20 people from the church. Twelve people were arrested, only three of the twelve arrested were from Poletown. Shortly afterward, the site targeted for the plant was razed and construction began on the new $500 million auto assembly plant.<<
http://en.wikipedia.org/wiki/Detroit/Hamtramck_Assembly