South Alamo Street Reconstruction Project: Upcoming Traffic Switch and December Updates
The City of San Antonio has released a new construction update for the South Alamo Street Reconstruction Project between Market Street and East César E. Chávez Boulevard, outlining important traffic changes and progress for December 2025.
Traffic Changes Beginning Monday, December 8, 2025
Starting as early as Monday, December 8, contractors will implement a major traffic switch at the Market Street intersection:
- Traffic will shift from the northeast intersection to the northwest intersection.
- Left-turn lanes for southbound traffic at Commerce & South Alamo will be closed.
- A detour will guide drivers from Commerce → S. Presa → Market Street to maintain mobility.
- One northbound lane will remain open from Market Street onto South Alamo.
Sidewalk and Intersection Access
Pedestrian access continues to be adjusted throughout the work zone:
- Eastside sidewalks
- Open: Nueva → César Chávez
- Closed: Market → Nueva
- Westside sidewalks
- Open: Market → Nueva
- Closed: Nueva → César Chávez
- Nueva Street will not allow eastbound right turns onto South Alamo due to active construction work.
A detailed detour map is provided to help drivers navigate the changes safely.
Ongoing Project Information
Construction activity will remain steady through the winter months:
- Nighttime concrete pours will continue through December 2025 and January 2026, as needed.
- South Alamo will maintain one southbound lane open throughout construction.
- César Chávez Boulevard remains fully open to traffic.
- Business access, parking lot access, and pedestrian routes are being maintained to support local businesses and visitors.
The City encourages all travelers to use caution in the construction zone and follow posted signage for the safety of workers and the public.