TxDOT Opened New I-35 Ramp in San Antonio

The new ramp connects southbound I-35 to I-410 South as part of the broader $3.5 billion expansion project.

Updated on Oct. 5, 2026 in Construction

TxDOT Opened New I-35 Ramp in San Antonio

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TxDOT has completed a new ramp linking southbound I-35 to I-410 South in San Antonio. This update is part of the massive 20-mile I-35 Northeast Expansion project designed to manage heavy regional traffic.

Why it matters

The $3.5 billion infrastructure project aims to increase capacity and improve safety for a corridor that currently serves more than 230,000 vehicles per day. By building elevated through-traffic lanes, the expansion seeks to mitigate congestion and support ongoing regional growth.

The I-35 Northeast Expansion project spans 20 miles from N. Walters Street to FM 1103 in Schertz. The total cost for the ongoing development is $3.5 billion.

The players

TxDOT

The Texas Department of Transportation is the government agency responsible for maintaining and developing the state's highway system.

The details

The project constructs elevated lanes that carry through-traffic above the current roadway with limited entry and exit points to streamline flow. Work is currently underway on four separate construction phases covering the corridor.

Construction on the FM 3009 to I-410 North segment began in 2022.
Work on the I-410 North to I-410 South phase began in 2024.
Development of the I-410 South to FM 78 segment began in 2025.
The segment from I-410 South to N. Walters Street began in 2026.
The total NEX project is scheduled for completion in 2032.

Market Landscape

This development follows the patterns established by the I-35 Northeast Expansion project to modernize aging highway infrastructure. It positions the region to better manage freight and commuter volume against the rapid population growth seen in the San Antonio area.

Commuters navigating the I-35 and I-410 interchange may experience shifts in traffic patterns and lane availability due to the new ramp opening. Drivers should remain alert for ongoing construction activity as the multi-phase project continues toward its 2032 completion date.

The takeaway

Large-scale infrastructure projects require long-term patience as construction phases shift traffic flow over several years. Residents should monitor local transportation updates to adjust their daily commutes as new lanes and ramps become operational.