About the MoPac Intersections Environmental Study

At the same time the MoPac South study is underway, a separate study is being conducted to evaluate potential mobility improvements at MoPac's intersections with Slaughter Lane and La Crosse Avenue.


The MoPac Expressway intersections at Slaughter Lane and La Crosse Avenue in southwest Austin were originally constructed in 1992 and have grown increasingly congested over the years. Traffic congestion at these intersections is causing travel delays and adversely affecting access and mobility.


The Central Texas Regional Mobility Authority (Mobility Authority) and the Texas Department of Transportation (TxDOT) are working with local partners to study mobility and safety improvements on the MoPac Expressway at the intersections of Slaughter Lane and La Crosse Avenue. As currently proposed, the MoPac mainlanes would extend through both intersections by going under both Slaughter Lane and La Crosse Avenue.

The study team will work together with the community to develop a solution that improves mobility, safety and connectivity while being sensitive to public and environmental concerns. Any proposed improvements will take into account the needs of:

  • Drivers
  • Transit riders
  • Bicyclists and pedestrians
  • Surrounding businesses
  • Neighborhoods
  • Environment


The Mobility Authority and TxDOT have initiated an environmental study to analyze the two intersections and determine the best options for improving mobility and safety. Over the course of the study, analysis of the potential social, economic and environmental impacts of the proposed improvements will be conducted.

We expect to have an environmental decision on the MoPac Intersections study in 2015. If the proposed improvements are environmentally cleared, TxDOT will design and construct the project and maintain the facilities.

Contact Us

3300 N. IH-35 Suite 300
Austin, TX 78705

(512) 996-9778 Email Us
Contact Us

3300 N. IH-35 Suite 300
Austin, TX 78705

Call (512) 996-9778
Email Us