Drivers in the United States again put a record number of miles on their vehicles in July, according to the latest Traffic Volume Trends report by the Federal Highway Administration.

During this month, the most recent one where data is available, the FHWA estimates that drivers covered 283.75 billion miles. This is the highest number ever recorded for the month, and it also marked an increase of 4.2 percent—or 11.4 billion miles—from July of 2014. Year-over-year travel has been increasing for 17 consecutive months.

The seasonally adjusted figure for the month, calculated by the Department of Transportation's Bureau of Transportation Statistics to adjust for seasonal variations in travel, stood at 264.4 billion miles. This number was a 0.8 percent decrease from June, but a 3.9 percent increase from the previous year.

Travel for the first seven months was estimated to be 1.82 trillion miles, a record amount. The previous record of 1.77 trillion miles was set in 2007.

The moving 12-month travel estimate was 3.1 trillion miles, an increase of 3.3 percent from the same estimate in July of 2014. The 12-month figure was also about 31 percent higher than the same estimate of 2.14 trillion miles in 1990.

The Northeast region—including the New England states, New Jersey, New York, and Pennsylvania—had the lowest travel total and year-over-year increase. Drivers in these states covered an estimated 40.8 billion miles, a 2.5 percent change from July of 2014.

Travel in Connecticut was estimated to be 2.88 billion miles, a 2.3 percent increase from the year before. This total included a 2.5 percent increase on rural arterial roads to 199 million miles and a 2.2 percent increase on urban arterial roads to 2.05 billion miles.

In Rhode Island, drivers traveled an estimated 769 million miles, a 2.2 percent year-over-year increase. Travel on rural arterial roads increased 6.9 percent to 66 million miles, while travel on urban arterial roads went up 1.7 percent to 558 million miles.

The 12 states of the North Central region had the highest amount of travel at an estimated 65.21 billion miles. Travel in this region was 3.3 percent higher than the year before.

The eight states of the South Gulf region had the largest increase in travel, which went up 5.1 percent to 55.85 billion miles. The South Atlantic region, with eight states and the District of Columbia, was close behind with a 5 percent increase to 59.45 billion miles. In the 13 states of the Western region, travel increased 4.7 percent to 62.43 billion miles.

For the second straight month, Hawaii was the state with the greatest year-over-year increase in travel. The total mileage covered in the archipelago increased 10 percent, from 1.02 billion miles in July of 2014 to 1.12 billion miles.

Florida had the next most significant increase in travel, which increased 6.8 percent to 17.53 billion miles. Texas had the third greatest year-over-year increase in travel at 6.6 percent, with an estimated 22.76 billion miles covered in the state.

North Dakota was the only state with a year-over-year decrease in travel. The distance traveled in this state dropped 0.1 percent to 988 million miles. This decrease included a 1.5 percent drop in urban arterial traffic to 173 million miles and a 0.6 percent decline in rural arterial traffic to 512 million miles.

Data for the FHWA Traffic Volume Trends comes from 5,000 continuous traffic counting stations in the United States, which determine changes in traffic flow. These differences can be used to estimate the total distance traveled and compare it to travel in the previous year. The FHWA says the estimates are limited by the relatively small sample size, and that more accurate information is available once a year through the Highway Performance Monitoring System.