More Weekend Closures Expected at Loop 1604 and I-10 Interchange as Construction Advances

Weekend disruptions continue at one of San Antonio’s busiest highway junctions

Drivers on the Northwest Side should expect additional weekend traffic impacts at the Loop 1604 and Interstate 10 interchange as construction continues on the multi-year Loop 1604 North Expansion. The work is centered on rebuilding the interchange and widening the corridor, a project designed to increase capacity and reduce congestion along a major commuter and commercial route.

The Loop 1604 North Expansion is a $1.4 billion, 23-mile program structured in six segments. The interchange with I-10 is identified as Segment 2, with an estimated completion in 2027. The broader program’s completion target extends to 2028.

What closures can look like and why they occur

Weekend closures at the interchange have been used to accommodate bridge construction and related work that cannot be performed safely with full traffic flows. When these closures are implemented, they can include restrictions on Loop 1604 mainlanes near the interchange, partial closures on I-10 mainlanes, and closures affecting I-10 frontage roads and connected ramps.

Detours used during major closures have routed drivers between Loop 1604 and I-10 via frontage roads and designated turnarounds, including movements that direct traffic to exit and re-enter using nearby access points such as UTSA Boulevard and La Cantera-area turnarounds. These detours are intended to maintain connectivity through the construction zone while allowing crews to complete critical bridge work.

Where drivers are most likely to feel impacts

The interchange serves large daily traffic volumes and provides access to major destinations in the La Cantera area and the UTSA corridor. As a result, restrictions to mainlanes or frontage roads can shift traffic to surface streets and frontage-road networks, increasing travel times and changing typical traffic patterns during closure windows.

• Loop 1604 mainlanes approaching I-10 from either direction
• I-10 frontage roads and ramps near the Loop 1604 crossing
• Connector movements between I-10 and Loop 1604 that rely on the interchange’s ramps and frontage roads

How the interchange rebuild fits into the larger construction timeline

Segment 2’s interchange reconstruction is part of a broader conversion of Loop 1604 into a higher-capacity expressway and includes construction of a fully directional, multi-level interchange at I-10. Other segments of the North Expansion are being built concurrently, adding to the likelihood of overlapping traffic impacts across the corridor.

Motorists should anticipate recurring weekend and overnight closures as bridge construction and ramp work continue through the interchange buildout period.

Drivers planning weekend trips through the area may need additional time and should be prepared to follow signed detours when closures are in effect.