Rolling Closures on I-10 West and Major Loop 1604 Work Headline Wednesday Commute

Wednesday Traffic Overview

For Wednesday, March 11, 2026, San Antonio commuters should prepare for a mix of scheduled afternoon closures on major arteries and ongoing expansion projects that continue to reshape the city’s North and West sides. While morning drive times are expected to follow standard rush-hour patterns, specific TxDOT alerts for the afternoon and ongoing detours for public transit users will require extra planning.

Major Highway Impacts: I-10 and Loop 1604

The most significant impact for the afternoon commute involves I-10 Westbound. According to official TxDOT reports, rolling closures are scheduled to begin today at 3:00 PM near Graytown. These closures will affect the left westbound main lanes from Cibolo to Graytown as crews work on permanent striping layouts. Motorists heading toward downtown from the east should anticipate sudden slowing and should consider shifting to the right lanes early.

On the North Side, the Loop 1604 North Expansion remains the primary driver of congestion. Construction zones are active from 5:00 AM to 8:00 PM near La Cantera Parkway. Further east, the transformation of the Blanco Road and Loop 1604 interchange into a diverging diamond pattern is in full swing. Drivers are advised that traffic patterns in this area have shifted significantly, and crews are frequently on-site managing lane braiding and overpass reconstruction.

I-35 Northeast Expansion and US 90

The I-35 Northeast Expansion (NEX) project continues to cause morning and evening delays between North Walters Street and FM 1103. With elevated lane construction spanning 20 miles across Bexar, Comal, and Guadalupe counties, commuters should expect reduced speeds and narrow lanes. In West Bexar County, U.S. Highway 90 expansion work between I-410 and SH 211 is also active, with ongoing efforts to widen the corridor and install new flyover ramps at the Loop 1604 interchange.

VIA Metropolitan Transit Detours

VIA transit riders will encounter several service disruptions due to these large-scale infrastructure projects. The following routes are currently operating on detours:

• Route 34 (South St. Mary’s Frequent): Detoured due to construction, with no service available from the Brooks Transit Center to Sidney Brooks.
• Route 36 (South Presa): Experiencing multiple detours affecting stops between New Braunfels and Hot Wells.
• Route 64 (US 90 Express): Detoured between Kel-Lac Transit Center and downtown.
• Route 77 (Martin): Facing service gaps near Rivas and Memorial due to local street improvements.

Surface Street Alerts

Local drivers should note that South Alamo Street remains under heavy construction between Market Street and Cesar E. Chavez Boulevard, significantly slowing access to the Hemisfair and Southtown areas. Additionally, recent reports of water over the roadway on Old Corpus Christi Road and Mauermann Road suggest that low-water crossings in those areas should still be approached with caution.