MAJOR Lane Change Updates at MoPac and Slaughter Lane!

Check out all the construction work happening on the MoPac Intersections project!

The picture on the left shows paving operations at Slaughter Lane in preparation for the temporary traffic shift.
The picture on the right shows a retaining wall being constructed on northbound MoPac.

Crews are getting ready to build the new Slaughter Lane overpass for the Diverging Diamond Intersection at MoPac and Slaughter Lane. In preparation for this work, the existing Slaughter Lane roadway at MoPac will be closed and traffic will be shifted to a new temporary roadway just south of the intersection. The traffic shift is scheduled to begin at 5 p.m. on Sunday, June 10, and is expected to be complete and open to motorists by 5 a.m. on Monday, June 11, weather permitting. Police officers will be on site to help direct traffic.


  • The dedicated right-turn lanes on both north and southbound MoPac will be CLOSED
  • The middle through-lane will be converted to a shared through- and right-turn lane
  • Increased travel time through the intersection
  • The configuration will be in place for the duration of the overpass construction—approximately six months

We understand the inconvenience this will cause and the increased travel time through the intersection. Crews are committed to getting the work done as quickly and safely as possible. We have put incentives in place to encourage the contractor to finish the work early. Conversely, the contractor faces penalties if the work is not completed on time. We appreciate your patience and understanding as we work to bring these needed safety and mobility improvements to the area.

Crews continue to work on sound walls, retaining walls, underground utilities, and ramp construction activities in various locations throughout the project limits. Excavation activities also continue in preparation for extending the MoPac mainlanes underneath Slaughter Lane and La Crosse Avenue.

Once the overpass is built, additional traffic shifts will take place to allow crews to construct and stripe the DDI. Work on the La Crosse Avenue overpass will begin once the DDI is open to traffic. The project is about 15% complete and on schedule to finish by early 2021, weather permitting.

Upcoming Activities

In the coming weeks, crews will widen the pavement on north and southbound MoPac south of La Crosse, continue with excavation activities, and begin work on sound walls on the northwest side of MoPac. Crews are anticipated to begin work on the Slaughter Lane underpass by mid-summer and expect it to be open to traffic in late spring. Once work begins, lane modifications will occur. We will share additional details as we get closer.

General Construction Information

Please note that schedules are subject to change due to weather or field conditions. General work hours take place Sunday through Friday. Work will occur both during the day and at night during the times shown below, unless otherwise noted.

Daytime Work Hours: 7 a.m. to 6 p.m.
Nighttime Work Hours: 7 p.m. to 6 a.m.


Alternating north and southbound lane closures continue nightly from South Bay Lane to Davis Lane.

Sunday – Thursday, 8 p.m. – 6 a.m.
Friday – Saturday, 10 p.m. – 8 a.m.


Alternating east and westbound lane closures continue nightly at the MoPac intersection.

Sunday – Thursday, 9 p.m. – 5:30 a.m.
Friday – Saturday, 10:30 p.m. – 8 a.m.

Please use caution when traveling through the work zone! Remember to follow us on Twitter @TxDOTAustin and #MoPacIntersections for up-to-date lane closure information. Updates will be shared via email. To sign-up please send an email to with “updates” in the subject line.

MoPac Intersections Project Team
(512) 693-7425