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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.

Why I-35?

The I-35 corridor through downtown Austi​​​n 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 t​​​o 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 CountyTravis County, and Hays County.​​


I-35 Downtown Stakeholder Working Group Report
Posted: 9 October, 2014

TxDOT's recently published report on the yearlong I-35 Downtown Stakeholder Working Group effort is available​​ now​.

Have you seen the Mobility35 concepts for downtown Austin?
Posted: 5 September, 2014

​Two concepts are being considered for downtown Austin, called Modified Existing and Depressed. Learn more about the options through our Downtown Visualizations​

Austin GEC Web Map
Instructions: To use the map, hover your mouse over the project for which you require information. Additional information will be displayed for that project. If you are using a mobile device, you will need to touch the project dot for information to be displayed.
SH 130 to RM 1431 SH 29 to Westinghouse Road I-35 at RM 1431 FM 3406 to US 79 RM 1431 to SH 45N Travis County SH 45N to SH 45SE Parmer Lane to Howard Lane FTC SH 45N to SH 45SE I-35 at US 183 US 183 to US 290E I-35 at 51st Street I-35 through the Decks I-35 through Downtown Austin I-35 at Riverside Drive I-35 at Oltorf Street I-35 at William Cannon Drive and Stassney Lane SH 45SE to Posey Road FM 2001 to FM 150 Bridge I-35 at Yarrington Road Ramp I-35 at Yarrington Road I-35 at Loop 82 and SH 80 I-35 at Posey Road
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