With a humming U.S. economy and airline traffic at an all-time high, the nation’s airports are collecting record revenues and investing heavily in renovating facilities to improve the traveler experience – just look at Maine. Last year, more than 2.13 million passengers travelled through Portland International Jetport, making it the all-time busiest year in the jetport’s history. Overall traffic at the jetport was up 14.6 percent year-over-year, surpassing the then-record 1.86 million passengers in 2017. More passengers means more money spent on parking tickets, food, clothing and more. And that means more money in airport coffers. There simply isn’t a crisis in…