“I always wanted to see the Pacific Ocean — and now we’re doing it!” Ms. Bandy said just before entering the national park.
Few, perhaps, carry a sense of wanderlust as far as Anne Utech, a 36-year-old federal employee, who found herself along Route 66 one recent Friday after visiting the giant meteor crater in northern Arizona. A year ago, she gave up her Houston apartment to go on the road full time in her pearl white Nissan Altima, which she has named Pearl. A copy of the Ralph Waldo Emerson essay “Self-Reliance” sat on the passenger seat.
“I do my best thinking while driving,” said Ms. Utech, who works from her laptop and stays with friends or at hotels or takes short-term rentals along the way. Most of all, she says, “I like to get lost, and Pearl is my best friend.”
All of this has been good news for the hotels, restaurants, theme parks and other destinations that depend on travelers’ rolling up on four wheels. Attendance at national parks last year reached 300 million for the first time. The 5.5 million who visited the Grand Canyon in 2015, for example, was a 16 percent increase from the year before, and park officials project a similar increase this year. On one recent weekend, during spring break, the car line at the south entrance was two and a half miles long, a wait that local rangers said was extremely rare.
Theme parks are also reporting strong business, with attendance up by about 2.5 percent in 2015, according to initial estimates. Industry experts project a 2.9 percent increase this year over last.
Over the long Memorial Day weekend, the AAA estimated that 34 million Americans took road trips of 50 miles or more, a 2.1 percent increase over last year and the highest number since 2005. Branson, Mo., the country music mecca, is investing $300 million in renovations and new attractionsfor the summer, including new indoor and outdoor adventure parks and a new Imax movie theater.
NBC Universal just opened the Wizarding World of Harry Potter attraction at its Hollywood theme park, which was estimated to cost $500 million, and it is just one of several recent expansions of tourist destinations in California — including Disneyland in Anaheim and Legoland California in Carlsbad. Buc-ee’s, a convenience store chain, just got approval from Katy, Tex., to build a gas station the size of a football field with 100 pumps along Interstate 10.
And then there is that ultimate symbol of the road trip, the recreational vehicle. Wholesale shipments last year reached the highest level since 2006 and appeared to be making further gains this year. Here in New Mexico, an R.V. resort is being built beside the Route 66 Casino Hotel, outside Albuquerque, complete with 100 full-service parking sites (as well as two fenced-in dog parks).
Part of the driving phenomenon can be explained by the improving job market and more commuting, but far from all of it. Public transit use was down slightly last year from 2014, while every driver averaged 2.6 percent more miles on the road. Rural and highway travel was particularly up. And early indications point to an acceleration of the trends this year.
Changes like these come at an inopportune moment, given the commitment by the United States to make steep reductions in carbon emissions after the Paris climate accord last year. The fact remains that coming to terms with climate change, experts say, means people must burn less petroleum in the future. With Americans driving more miles at lower cost — and in bigger S.U.V.s, recreational vehicles and trucks — that goal is going to be harder to reach, at least in the short term.
According to Dan Sperling, director of the Institute of Transportation Studies at the University of California, Davis, most of the increased driving can be accounted for by the steep decline in prices at the pump. Gasoline prices have fallen more than 50 percent in the last two years, he said, saving the average household with two cars as much as $1,000 a year.
New models of cars and light trucks, which under federal rules must nearly double their fuel efficiency by 2025 to 54.5 miles per gallon, “will more than offset the behavioral increase of more driving,” he said. “In 10 years vehicles will be consuming half as much fuel as they do today.”
Fuel prices certainly figured in Frank Claeys’s decision to take a 10-day road trip with his wife and two sons during their spring break. They were originally just planning to drive to Utah for some backpacking. But with a gallon of gas cheaper than some candy bars these days, they decided to stretch the journey all the way to the Texas Panhandle.
“We were less tight,” said Mr. Claeys, a 40-year-old police officer from Gaylord, Mich., as his children bought ice cream and shopped for polished stones at a roadside trading post in New Mexico. “At $2 a gallon, I don’t cringe at the pump.”
Aaron Conley, the 35-year-old owner of a Cincinnati lawn landscape company, has been taking long road trips with his girlfriend, Michelle Mercer, a bartender from Burlington, Ky. This year they drove to New Orleans for Mardi Gras, then took a swing around the Gulf Coast to Port Arthur, Tex.; Lake Charles and Baton Rouge, La.; and finally the Florida Panhandle.
On a recent trip they flew to Las Vegas and then drove to the Hoover Dam; the Grand Canyon; Sedona, Ariz.; and finally Death Valley, Calif. “When gas was $4 a gallon, we didn’t travel at all,” he said, recalling the early years of the couple’s six-year relationship.
And — in one sign of how quickly things could change again — they almost didn’t make it to the Grand Canyon this spring. The reason? They discovered that prices were not quite as low as they thought. “When we saw gas was $2.25 a gallon here, that was at the tipping point,” he said of the difference between prices in northern Arizona and the $1.70 he had been seeing back home.
Ms. Mercer was quick to agree. “I’d rather not spend a lot of money on gas,” she said.