Pack some patience on your next commute: One of Texas’ notorious interstates is also one of the most congested roadways across the Lone Star State.

The Texas A&M Transportation Institute, in partnership with the Texas Department of Transportation, unveiled late last year its roundup of the 100 busiest roadway segments across Texas – and one of Austin’s worst stretches of traffic crept its way into the Top 10.

Unsurprisingly, the report found Harris County’s West Loop Freeway and Interstate 610 experienced the worst congestion levels statewide, with a specific emphasis on the segment running from the Katy Freeway, I-10 and U.S. Hwy. 90 to the Southwest Freeway, U.S. Hwy. 59 and I-69. That segment maintained its No. 1 standing from both 2023 and 2024, with the latest estimates anticipating an annual congestion cost of $166.3 million due to the traffic holdups.

While the greater Houston area dominated the rankings, claiming seven out of the Top 10 spots, Austin’s I-35 reared its head and revved ahead to stake out a No. 9 ranking. The Texas A&M Transportation Institute found I-35’s nearly eight-mile segment between U.S. Hwy. 290 and RM 2222 down to Ben White Boulevard and State Hwy. 71 featured an annual congestion cost encroaching $206.5 million; however, its 2025 ranking represented an improvement from past years’ figures, where the interstate corridor earned No. 3 and No. 4 congestion rankings in 2024 and 2023, respectively.

That same corridor correlates with the ongoing I-35 Capital Express Central Project, an approximately $4.5 billion, eight-mile project slated to widen and overhaul the Texas’ capital interstate segment near downtown Austin. Construction on that undertaking began in October 2024 and is expected to run through 2033, based on current project timeline estimates.

Austin’s I-35 portion wasn’t the only part of the interstate to earn a Top 10 congestion ranking in Texas. Northward in the Dallas-Fort Worth area, Tarrant County’s North Freeway, I-35W and U.S. Hwy. 287 interchange, running from State Hwy. 83 to I-30, nabbed the No. 8 rank.

This article originally published at I-35 revs ahead into Texas’ Top 10 most congested highways, roadways.