Nebraska edged Michigan to take the dubious honor of having the most expensive gas in the nation, according to a recent nationwide AAA gas price survey, the Associated Press reports. The average price for a gallon of gas in Nebraska was $3.34, 29 cents above the national average of $3.05. Wisconsin, Illinois and Hawaii join Nebraska and Michigan to round out the top five most expensive places to buy gas, all with prices between $3.28 and $3.34, according to AAA. AAA gives South Carolina the cheapest gas ranking, at $2.83, followed by New Jersey, Tennessee, Arkansas and Mississippi, all between $2.83 and $2.89. According to the AP, industry officials have said short supplies due to refinery problems are driving up prices in the Midwest.