As the prime Construction Engineering and Inspection (CEI) consultant, STV provided comprehensive engineering, inspection, materials testing, site observation and documentation services for the first flyover ramp at the Loop 1604 and I‑10 interchange in San Antonio. This major connection is a key component of the broader Loop 1604 North Expansion project, one of the region’s largest infrastructure upgrades. The new flyover improves pedestrian access, reduces driver conflict points and supports the Texas Department of Transportation’s overall safety and mobility goals.
What challenges did STV address?
The interchange area is one of San Antonio’s most congested corridors, designated under the statewide Texas Clear Lanes initiative to alleviate traffic in areas with chronic delays. STV was responsible for ensuring all construction activities met specifications and design intent while coordinating complex work zones, maintaining safe traffic operations and documenting compliance during a high‑visibility, high‑volume project.
What solutions did STV deliver?
STV’s CEI team provided continuous monitoring and documentation throughout construction, confirming adherence to TxDOT requirements and approved plans. Services included materials testing, structural and roadway inspection, field observation and daily reporting. STV assessed contractor work for quality, safety and conformance while supporting the introduction of San Antonio’s first major flyover and its first divergent diamond interchange geometry.
How does this project benefit the community?
The new flyover enhances regional mobility by reducing congestion, improving traffic flow and supporting safer access for pedestrians and drivers. As part of the Texas Clear Lanes program, the project eases travel for residents, freight carriers and visitors while helping accommodate long‑term growth in the region.
Key stats and accolades
- First major flyover at the Loop 1604 and I‑10 interchange
- Part of the statewide Texas Clear Lanes program
- Includes San Antonio’s first divergent diamond interchange
- Improved pedestrian access and reduced driver conflict points
