Austin updates I 35 cap and stitch design as funding deadline approaches

Austin City Council members gathered on April 8, 2025, to discuss the critical I-35 cap and stitch design options, a project aimed at enhancing urban connectivity and green space in the city. The meeting provided an update on the project's progress and outlined upcoming funding decisions that will significantly impact the city's infrastructure.

Assistant City Manager Mike Rogers emphasized the importance of the cap and stitch project, which seeks to create park-like decks over the I-35 highway. This initiative is designed to improve community access and reduce the highway's barrier effect on neighborhoods. The council is currently awaiting a decision on a substantial $5.1 billion grant that could fund a significant portion of the project. However, Rogers noted that the city must prepare for funding commitments to the Texas Department of Transportation (TxDOT) by May 31, 2025, to ensure the project moves forward.

The presentation highlighted eight potential cap and stitch locations, with the project divided into five phases. The first two phases focus on roadway and deck elements necessary for supporting overhead structures, while subsequent phases will introduce additional amenities. The council is tasked with selecting which locations to prioritize, based on a scoring matrix that evaluates cost-benefit ratios and community feedback.

Financial implications were a key topic, as the council discussed the potential for cost escalations of 35% to 45% after the 2026 bid package letting date. The urgency of the funding decision is underscored by the looming deadline, which could affect the city's capacity to include these projects in the upcoming 2026 bond program.

In addition to the cap and stitch project, the council addressed other related infrastructure improvements, including a feasibility study for a potential rail station and enhancements to the East Avenue Trail. These discussions reflect a broader commitment to improving urban mobility and environmental quality in Austin.

As the council prepares for the May deadline, the decisions made in the coming weeks will shape the future of Austin's urban landscape, emphasizing the need for strategic planning and community engagement in infrastructure development.