(Radio Iowa) — Triple-A predicts a three-and-a-half percent increase in travel volume this Memorial Day weekend, sparked — perhaps — by lower gas prices. Triple-A’s fuel price survey indicates the average price today (Friday) for regular unleaded gasoline is two-66 a gallon in Iowa. That’s 20 cents less than it was during the Memorial Day weekend last year. Gas prices in Iowa were about seven cents higher per gallon a month ago. Triple A projects that nearly 40 million Americans will travel 50 or more miles from home this weekend.