Project overview
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Project overview

Project information

TxDOT awarded Alamo NEX Construction the I-35 NEX Central Project. Construction on this project began June 2022. The project consists of the design, construction, and maintenance of 9.5 miles of non-tolled improvements along I-35 and runs through northeast San Antonio, Live Oak, Selma, and Schertz in Bexar and Guadalupe counties. 

  • Project limits: I-35 from I-410 N to FM 3009
  • Project construction cost: $1.5B
  • Contractor: Alamo NEX Construction, LLC
  • Construction start date: June 2022
  • Estimated completion date: 2027

For project background and previous public involvement and environmental studies visit the projects and studies page. Click through the milestones below to see how the project has progressed throughout the years. 

Project scope

Construction of three elevated lanes, including two mainlanes and one high-occupancy vehicle (HOV) lane in each direction. The I-35 elevated lanes will provide direct connections to I-410 North and Loop 1604 West.

Widening of I-35 general purpose lanes from north of Olympia Parkway to south of FM 3009, along with reconstruction of Loop 1604 general purpose lanes and bridges from Nacogdoches Road to I-35.

Operational improvements including the construction of ramps to connect I-35 mainlanes to elevated lanes, and reconfiguration of entrance and exit ramps throughout the project. 

Typical section

The following graphic illustrates what the elevated lanes as described above on I-35 will look like upon completion of the project. 

Project map

Project milestones

  • Groundbreaking in May 2022
  • Construction began June 2022
  • Drill shafts began in September 2022