This project will increase the safety of motorists and first responders during floods at the low water crossing on Old San Antonio Road. It includes installing a cul-de-sac and permanent gates. Visite esta página en español.

The cul-de-sac will make turning around easier when the road is flooded. The permanent gates will provide a more effective barricade during floods than the current system of using portable barricades. For the timebeing, the gates will remain open during normal conditions.


This low water crossing is very dangerous when flooded. Up to 16 feet of water could potentially pass over the roadway. We had originally proposed permanently closing the road. Based on public feedback, we will keep the road open until a traffic light has been installed at FM 1626 and Old San Antonio Road.

The project team explored other options to improve the low water crossing. We are making the recommendation to eventually close the road based on cost, constructability and effectiveness.

Map showing low water crossing.


  • The gate will provide a more effective means of closing the road during floods than the current portable barricades.
  • The cul-de-sac will allow vehicles to turn around easily.
  • The historic bridge will remain.
  • A private development includes the installation of a traffic signal on FM 1626 and Old San Antonio Road. We are exploring ways to expedite this traffic signal.
  • The City of Austin and a private developer are in the early planning stages for an extension of Brezza Lane.

FM 1626 (Between I-35 and Manchaca Rd)

As part of the 2016 Transportation Mobility Bond, the Austin Transportation Department recently completed a Preliminary Engineering Report (PER) for FM 1626 between I-35 Manchaca Road.  The report evaluated the current road conditions making safety and mobility recommendations for future design and construction opportunities.  The PER performed its analysis with the assumption that the low water crossing on the north end of Old San Antonio Road would be closed.  The full PER and additional information about FM 1626 are available on the Austin In Motion website.

Travis County Low Water Crossing

Travis County is planning to build a wider and taller bridge on Old San Antonio Road, south of FM 1626. More information is available on the Travis County website.



If you would like to receive email updates about this project, send an email to Stephanie Lott or call 512-974-2799.