Driving on North Texas toll roads will cost more starting July 1.

TollTag rates will increase about a penny more per mile, from an average of 18 cents per mile to about 19 cents per mile, according to the North Texas Tollway Authority, which manages area toll roads.

The price hike is part of NTTA’s toll rate schedule that rolls out increases every other year.

Regularly scheduled toll rate increases help NTTA pay its bills, including more than $9.25 billion in bonds issued to build area toll roads, according to a news release. The agency is also investing nearly $2 billion in capital projects, including adding lanes to the Dallas North Tollway, President George Bush Turnpike and the Sam Rayburn Tollway. The extra lanes are meant to relieve congestion and improve mobility in the region.

About 82% of toll road users have a TollTag, which offers discounted rates, according to NTTA. Those without TollTags, known as ZipCash customers, typically pay 50 percent higher toll rates, the agency stated.

“A TollTag saves money and is the most convenient way for drivers to travel toll roads throughout Texas, Oklahoma and Kansas,” NTTA Chairman John Mahalik said in a news release.

NTTA crews will be changing toll road signs over the next several weeks to reflect the new rates, according to the release. Drivers should be on the lookout for crews at work.

The new rates take effect July 1 on the Dallas North Tollway, President George Bush Turnpike, Sam Rayburn Tollway, Addison Airport Toll Tunnel, Lewisville Lake Toll Bridge, Mountain Creek Lake Bridge, Chisholm Trail Parkway and 360 Tollway.