Loop 1604 from SH 16 to I-35
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Loop 1604 from SH 16 to I-35

Visualization fly over

TxDOT is moving forward with plans to improve approximately 23-miles of Loop 1604 from SH-16 (Bandera Road) to I-35 in north Bexar County. The Loop 1604 Expansion Project involves several transportation improvements that are designed to improve mobility, reduce congestion and enhance safety along the high-traveled corridor.


The project includes the following improvements:

  • Expanding Loop 1604 from a four-lane expressway to ten-lane expressway with the addition of two general purpose lanes in each direction.
  • Adding one high-occupancy vehicle lane in each direction.
  • Reconfiguring the layout of auxiliary lanes and entrance and exit ramps.
  • Removing the cloverleaf connectors.Replacing the cloverleaf interchange at IH 10/LP 1604 with a five-level direct connect interchange
  • Adding direct connectors.
  • Replacing the signalized frontage road intersections with a continuous flow configuration.Upgrading Blanco Road and LP 1604 to an innovative intersection
  • Accommodations for bicyclists and pedestrians, water quality protection, and other highway features.
  • All improvements are located within the existing right of way and easements.

Project segments

Download map of all segments

Segment 1: Loop 1604 from SH 16 (Bandera Road) to I-10

  • Download segment 1 map
  • Letting Date: April 2021
  • Anticipated Start: May 2021
  • Anticipated Completion: 2024
  • Estimated Cost: $148 million

Segment 2: Loop 1604 and I-10 Interchange

  • Download segment 2 map
  • Anticipated Letting Date: Fall 2021
  • Anticipated Start: 2022
  • Anticipated Completion: 2027
  • Estimated Cost: $418 million

Segment 3: Loop 1604 from I-10 to US 281

  • Download segment 3 map
  • Anticipated Letting Date: June 2021
  • Anticipated Start: Late Summer 2021
  • Anticipated Completion: 2025
  • Estimated Cost: $234 million

Segment 4: Loop 1604 from US 281 to Redland (unfunded)

  • Download segment 4 map
  • Anticipated Letting Date: 2025
  • Anticipated Start: TBD
  • Anticipated Completion: TBD
  • Estimated Cost: $130 million

Segment 5: Loop 1604 from Redland to I-35 (unfunded)

  • Download segment 5 map
  • Anticipated Letting Date: TBD
  • Anticipated Start: TBD
  • Anticipated Completion: TBD
  • Estimated Cost: $265 million


Once complete, the planned project improvements will reduce congestion, improve mobility and enhance safety by:

  • Decreasing future travel times by as much as 80 minutes
  • Increasing capacity with non-toll general purpose and HOV lanes
  • Integrating multimodal improvements with the construction of continuous sidewalks and bicycle accommodations
  • Creating a fully directional, five-level interchange at I-10 and Loop 1604

Project updates

TxDOT is committed to providing timely project updates as they are available. If you are interested in receiving updates, please subscribe.

Construction impacts to traffic

Throughout construction of these improvements, drivers will experience temporary traffic shifts and overnight lane closures on the mainlanes and frontage roads, as well as temporary daytime and overnight ramp closures.

Daytime work is anticipated to take place Mondays through Saturdays, while nighttime work and any necessary lane closures are anticipated to take place between 9 p.m. and 5 a.m., Sunday evenings through Friday mornings.

Traffic updates

Permanent and temporary digital message boards placed along the route will alert drivers in real-time to lane closures, traffic congestion and construction activity.

For the latest on construction closures and traffic shifts, follow us on Facebook and Twitter or visit the San Antonio District’s Go Ahead! Blog.

Public involvement

The purpose of the open house is to share project information and updates, present proposed schematics of the proposed project and collect input from the community. TxDOT is committed to working closely with the community on this project. All input will be considered as TxDOT moves forward in developing a plan that will enhance the safety of this corridor while preparing for future growth.