Recent declines in gas prices aren’t expected to continue. The Charlotte-based motorclub AAA Carolinas expects prices this spring to rise to levels not seen since the summer of 2015 when Americans were paying an average of $2.81 a gallon for regular. Prices in North Carolina have declined each of the last three weeks, standing currently at $2.41 a gallon. AAA says drivers will start to see prices spike upward in early April, a time when refineries finish maintenance and start to switch over to more expensive summer-blend gasolines. That will start a rise in prices before the start of summer that potentially could add 40 cents to a gallon. AAA does not expect prices to reach highs experienced between 2011 and 2014 when nationally consumers paid an average $3.47.