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Read my essay on San Antonio's freeway history for the Express-News' Tricentennial series here. The full history of the freeway system is available on this site here.

San Antonio Area Freeway System
PROJECT INFO: Loop 410 at SH 151

This page last updated September 17, 2017


Project locationLocation: Loop 410 from Ingram Rd. to SH 151 and SH 151 from Loop 410 to Hunt Ln.

Status: Under construction (59% complete)

This $81.8 million project will construct the first phase of a fully-directional interchange at Loop 410 and SH 151. Specifically, this phase will construct the eastbound SH 151 to northbound Loop 410 and the southbound Loop 410 to westbound SH 151 connectors. In addition, Loop 410 will be widened to eight lanes from Ingram to SH 151 and auxilary lanes will be added to both directions of 151 from Loop 410 to Potranco (eastbound) and Hunt (westbound.) Several ramps on Loop 410 and SH 151 will be relocated to accomodate the new connectors and to improve traffic flow. An access road flyover on southbound Loop 410 at Military will be added as will turnarounds on SH 151 at Ingram, Potranco, and Hunt.

How this project will help
This project will provide new direct connections on the heaviest turn movements in the 410/151 interchange. This will remove that traffic from the existing intersections and access roads which will significantly improve overall mobility and safety for the remaining turning movements and local traffic. The addition of an extra lane on Loop 410 will help eliminate the bottleneck in that area. Since the existing exit for SH 151 on southbound Loop 410 will be removed, the access road flyover on southbound Loop 410 at Military will allow traffic headed to eastbound SH 151 as well as accessing the commercial areas at SH 151 and Loop 410 to bypass the signalized intersection at Military.

Work started on October 10th, 2015, and is expected to be complete in late 2018. Future projects to complete the full interchange are not yet funded, so there is no timeline for those.


  • Why has work stopped on the flyovers?
    An engineering error was discovered in the plans for the long steel beams that will used in the missing section. This error was caught before manufacture of those beams; however, it took some time to correct the error. This delayed the manufacturing of those beams. In the meantime, in order to prevent the project from being delayed, the contractor has worked on other areas of the project out-of-sequence. Therefore, this issue should not cause any delay in the overall completion date of the project.

Click on the image below to see an annotated overview schematic of this project. The base schematic is courtesy of TxDOT; the annotations are my own.

 (Note: the schematic is somewhat large and may take a few seconds to open.)

Loop 410 (Ingram to SH 151) and SH 151 (Loop 410 to Hunt) (1.90 MB)

Click on image above to see larger schematic

Other sites of interest
TxDOT - I-410 Interchange Improvements

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