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The Texas Department of Transportation has begun digging a 22-foot-wide tunnel near Airport Boulevard in Central Austin to mitigate future flooding. (Courtesy TxDOT)

TxDOT spends $748M to burrow bus-size tunnels under Central Austin

By Haley McLeod

The Texas Department of Transportation is set to launch one of Austin’s largest underground construction projects in 2026—digging 6.5 miles of 22-foot-wide tunnels beneath the city’s busiest highway.

More City & County News

Round Rock's Beaujolais Nights event has been canceled for 2025. (Courtesy city of Round Rock)
Beaujolais Nights canceled for 2025 amid renovations ...
Round Rock officials approved changes to downtown zoning to expand its boundaries and provide more uses. (Courtesy city of Round Rock)
Round Rock council approves downtown zoning overhaul ...
The Round Rock Police Department's Operation Front Porch package pickup program returns Nov. 17 for the holiday season. (Brooke Sjoberg/Community Impact)
Operation Front Porch returns for the 2025 ...
a courthouse is framed by trees in the foreground
WilCo property owners will soon receive property tax statements
Executive Director of Juvenile Services Scott Matthew said the juvenile justice grants are "a long time coming." (Gracie Warhurst/Community Impact)
Williamson County seeks $1.4M in federal grants to help at-risk youth
Formula 1 United States Grand Prix at the Circuit of the Americas near Austin has brought billions of dollars to the Central Texas region. (Courtesy Matthew Brooks)
New deal secures long-term future of Formula 1 event in Austin
Drone shot of Williamson County Fair and Rodeo
Home prices, Austin ISD and the county fair: 6 trending Austin-area stories
Williamson County Emergency Management Director Bruce Clements presented the progress on debris removal due to the floods at a meeting Oct. 14. (Gracie Warhurst/Community Impact)
WilCo flood cleanup operations to conclude in December
aerial view of a baseball field with sidewalks around it
City to hold open houses for Round Rock trails Oct. 15, 16
Workers in safety vests operate paving equipment to lay new asphalt on a residential street; traffic cones are placed for safety.
Round Rock approves $2.9 million contract to maintain city streets
Drone shot of Hwy 290
6 trending Austin-area stories: road improvements, school closures, tech expansions
ERCOT and PUCT officials in January 2025.
ERCOT predicts Texas power grid will remain stable in December
The Sheriff's Office, Justice Center and county-operated jail are currently located near Fourth Street in downtown Georgetown. (Gracie Warhurst/Community Impact)
WilCo makes interim plans for office space ahead of administration building move