Beginning in 2011, a partnership between TxDOT, the city of Austin and the Capital Area Metropolitan Planning Organization formed with the goal of improving I-35 within the limits of SH 130 (north of Georgetown) and Posey Road (south of San Marcos). This locally-led initiative, called Mobility35, is working to improve mobility on I-35 in the Capital area.
The I-35 corridor through downtown Austin is identified as one of the most congested segments of roadway in Texas. The Texas A&M Transportation Institute determined that if nothing is done to address Austin’s congestion issue, the 19-mile commute from downtown Austin to Round Rock will take as long as 2.5 hours by 2035.
Learn more about the history of the Mobility35 program and use the map below to explore potential improvements along I-35 in Williamson County, Travis County, and Hays County.
TxDOT's recently published report on the yearlong I-35 Downtown Stakeholder Working Group effort is available now.
Two concepts are being considered for downtown Austin, called Modified Existing and Depressed. Learn more about the options through our Downtown Visualizations.