ST. PAUL, Minn. - The man in charge of Minnesota's transportation system is stepping down to become President and CEO of AAA Minneapolis.

Minnesota Department of Transportation (Mn/DOT) commissioner Tom Sorel announced his resignation Thursday. He has served as commissioner since 2008 and will start his new job December 1.

"Tom Sorel has served the State of Minnesota with excellence, and I thank him for his dedicated public service to the people of Minnesota," said Governor Mark Dayton in a written statement. "Tom's strong leadership, depth of knowledge, and decades of experience will serve him well in this new venture. I wish him well as he takes on this new role."

Sorel is widely credited with rebuilding MnDOT and restoring public confidence in the wake of the I-35W Bridge collapse. He helped institute an ambitious and expensive program to rehabilitate suspect bridges across the state to improve public safety.

Governor Dayton has appointed Bernie Arseneau to serve as acting commissioner. Arseneau, Mn/DOT's current Deputy Commissioner and Chief Engineer, has served the agency for nearly 30 years in a variety of roles including Division Director for the Mn/DOT Policy, Safety & Strategic Initiatives Division, Director of the Office of Traffic, Safety and Operations while serving as the State Traffic Engineer, Area Maintenance Engineer and Tort Claims & Traffic Standards Engineer.

AAA is a federation with more than 50 clubs throughout the U.S. and Canada and provides travel-related services.