San Antonio motorists face significant overnight disruptions this weekend as part of the I-35 Northeast Expansion Program. The Texas Department of Transportation (TxDOT) has announced closures affecting southbound frontage roads and key interchange ramps on the city's Northeast Side.
Overnight closures from Fratt Road to Exit 164B
TxDOT has scheduled specific windows of disruption for the southbound I-35 frontage road, specifically the stretch south of the Fratt Road entrance ramp to Exit 164B. According to the report, these closures are expected to run from 9 p.m. Saturday, Sept. 19, to 8 a.m. Sunday, Sept. 20, 2026, provided weather conditions remain favorable.
A second round of closures is also slated for the same area, beginning at 3 p.m. on Sunday, Sept. 20, and lasting until 5 a.m. on Monday, Sept. 21, 2026. These nightly windows will also impact the northbound-to-southbound U-turn located at Walzem Road, forcing drivers to seek alternative routes to reach their destinations along the highway.
The I-410 South interchange and George Beach Avenue detour
The expansion work also targets the critical connection between I-35 and the I-410 South interchange. As the report indicates, two specific ramps are expected to close during the Saturday night window: the southbound I-35 connector ramp to southbound I-410 South and the southbound I-35 frontage road entrance ramp to southbound I-410 South.
Drivers attempting to navigate this interchange will be redirected to the southbound I-35 frontage road toward George Beach Avenue. To complete the connection, travelers must use a signalized turnaround at George Beach Avenue to enter the northbound I-35 frontage road, eventually using a connector to reach the southbound I-410 South entrance ramp south of Winnco Drive.
Two detour options for Walzem Road commuters
Commuters looking to bypass the Walzem Road closures have two distinct paths available. the first option directs drivers to the northbound I-35 frontage road and then onto the Northeast I-410 Loop, where they must keep left to turn around and access the southbound I-35 frontage road via the Eisenhauer Road exit.
The second detour option provides a more localized route through the Northeast Side . Drivers on Walzem Road can turn north onto Interchange Parkway, continue to Fratt Road, and then make two right turns to enter the southbound I-35 frontage road.. Once on the frontage road, drivers will be directed to enter the southbound I-35 mainlanes north of Walzem Road and use the Eisenhauer Road exit to return to the frontage road.
Uncertainties regarding the 2026 expansion schedule
The reported timeline for these closures raises significant questions regarding the long-term planning of the I-35 Northeast Expansion Program. Most notably, the source cites dates in September 2026, leaving it unclear whether this is a clerical error in the announcement or a highly advanced scheduling notice for a multi-year project.
Furthermore, while TxDOT has provided detailed technical instructions, the report lacks perspective from local Northeast Side residents or business owners who may be impacted by these nightly disruptions. It remains unknown how much these weather-dependent closures will shift if inclement conditions arise, or how the complexity of these multi-step detours will affect overall traffic congestion in the San Antonio metro area.
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