Gas prices increased slightly from last week, AAA Michigan reports. Michigan's current statewide average is about $2.30 per gallon, up a penny from last week. This is the fourth week in a row that statewide average gas prices have risen above $2.

Of the cities surveyed by AAA, the cheapest price for self serve unleaded fuel can be found in the Detroit and Marquette areas where it's about $2.29 per gallon. The highest average can be found in the Traverse City area where it's about $2.37 per gallon. Gas prices in and around the Flint area are averaging $2.31 per gallon as of Sunday, up almost 10 cents from last week.

According to AAA, the increasing gas prices over the past few weeks can be attributed to more expensive crude oil costs and the start of refinery maintenance season. AAA says even with gas prices trending higher, ample gasoline supplies and lower crude oil costs than in recent years should prevent prices from rising as high as in recent memory. AAA says barring any major disruptions in supply, drivers will continue to pay below $3 per gallon throughout 2015.

AAA surveys more than 2,800 Michigan gas stations daily. For more information, visit