150 millionth vehicle crosses Mackinac Bridge Posted on September 7th, 2009 150 millionth vehicle crosses Mackinac Bridge Richard Snyder, of Clare, Michigan, was the 150 millionth vehicle to cross the Mackinac Bridge around 5:30 p.m. on September 6, 2009. Approximately 50,000 people walked the Mackinac Bride for the Annual Mackinac Bridge Walk on September 7, 2009.