Drivers in the United States put a record number of miles on their odometers in May, according to the latest travel data from the Federal Highway Administration.

The total travel for May was 275.1 billion miles. This figure represents about 22 percent of all travel in the first five months of 2015, and it was also the highest May total recorded by the FHWA.

May's travel total was 2.7 percent higher than the same month in 2014, an increase of 7.3 billion miles. This marked the 15th consecutive month of year-over-year increases in travel.

The seasonally adjusted travel total for May was slightly lower at 262.1 billion vehicle miles, though this marked a larger year-over-year increase of 3.4 percent, or 8.4 billion miles. This seasonally adjusted total was 0.2 percent higher than April's travel tally.

May's total put the total estimated travel for the first five months of the year at 1.26 trillion miles. The moving 12-month total stood at 3.08 trillion miles, the first time this total has exceeded 3 trillion miles in May since 2008.

The Northeast region—consisting of New England, New Jersey, New York, and Pennsylvania—had the lowest travel total and second lowest growth. Drivers in these states covered an estimated 40 billion miles, 2.2 percent more than the total of 39.1 billion miles in May of 2014.

Travel in Connecticut increased 1.4 percent, going from 2.82 billion miles in May of 2014 to 2.85 billion miles in May of 2015. This increase included a 1.1 increase in travel on urban arterial roads, from 2.02 billion miles to 2.04 billion miles, and a 3 percent increase in travel on rural arterial roads from 178 million miles to 184 million miles.

The 12 states of the North Central region had the highest cumulative travel total at 62 billion miles, but also the lowest year-over-year increase at 1.6 percent. The greatest increase in travel rates occurred in the South Atlantic region, which includes eight states and the District of Columbia. Travel here went up by 3.4 percent, from 56.55 billion miles to 58.45 billion miles.

In the eight states of the South Gulf region, travel increased 3 percent from 53.3 billion miles to 54.92 billion miles. The miles traveled in the 13 states in the Western region went from 57.89 billion miles to 59.75 billion miles, a 2.7 percent increase.

Arkansas had the greatest increase in travel, with the vehicle miles traveled in this state increasing 9.3 percent from 2.98 billion miles to 3.26 billion miles. Hawaii had the next most significant increase at 8.9 percent, going from 746 million miles to 812 million miles. Tennessee had the third highest increase in travel, with total miles increasing 5.4 percent from 6.17 billion miles to 6.5 billion miles.

Overall travel increased in all but three states. North Dakota had the largest decrease in travel at 3.5 percent, falling from 863 million miles to 833 million miles. Oklahoma travel fell 3.2 percent, from 4.27 billion miles to 4.14 billion miles. Kansas had a decrease of only 0.2 percent, with travel holding at about 2.73 billion miles.

The FHWA relies on data from 4,800 continuous count stations across the United States for its monthly travel estimates, which are issued on a two-month delay. These stations are used to estimate changes in travel in the same month from year to year, and the estimates are adjusted annually to incorporate information from the Highway Performance Monitoring System.