AAA Michigan says gasoline prices have risen roughly 6 cents during the past week to a statewide average of about $3.47 per gallon.

The auto club said Monday the average is about a penny per gallon less than last year at this time.

Of the Michigan cities it surveys, AAA Michigan said the cheapest price for self-serve unleaded fuel is in the Saginaw/Bay City area, where it's about $3.37 a gallon. The highest average is in the Ann Arbor area at about $3.49.

Dearborn-based AAA Michigan surveys 2,800 Michigan gas stations daily.