Gas prices across the state have rose to some of their highest prices in recent memory. Drivers in Michigan are now paying an average $2.27 per gallon, that’s 13-cents more than last week and 31 cents more than a month ago. The most expensive gas is in Lansing, Jackson and Grand Rapids. And the least expensive gas is in Traverse City, Metro Detroit and Ann Arbor. Port Huron area pumps are just a penny above the statewide average, asking $2.28 a gallon, according to AAA of Michigan.