Increased bridge tolls: It will cost more to drive across the Mackinac Bridge in the new year. The new toll for an automobile or passenger vehicle will be $4 starting Sunday. That's up from $3.50. A vehicle with a trailer will be charged $2 per axle. Commercial trucks and motor homes will pay $5 per axle. The new commuter rate will be $2 per crossing. That's provided commuter card holders make their return trip within 36 hours of the first one. The new rates are among those that were approved in 2007 to help maintain the five-mile bridge connecting Michigan's upper and lower peninsulas. The 54-year-old bridge is maintained and operated exclusively with toll revenue. Some tolls also are scheduled to increase in 2013 and 2014.