Status: Under Construction

Feb. 2, 2026 Status Update: The City of Austin continues making progress on multiple projects along South Lamar Boulevard. Below is the latest schedule and what to expect next.

 

Mary Street Roundabout

Work on the Mary Street roundabout is in the final stages. Completion is anticipated by mid-March 2026.

 

Storm Drain Improvements

Construction is now underway on the storm drain project, which will improve drainage and support long-term roadway conditions along the corridor. This work is expected to continue through the next several years, with completion anticipated in 2027.

 

Del Curto / Bluebonnet Roundabout

The City has selected a contractor for the Del Curto/Bluebonnet roundabout (the same contractor currently working on the storm drain project). Construction is expected to begin in Fall 2026.

 

South Lamar Corridor Improvements (Full Corridor)

The overall South Lamar Corridor project is approaching final design. To help deliver improvements more efficiently, the City is dividing the corridor into two segments at Montclaire Street:

  • Southern Segment (Montclaire Street to US-290):
    Anticipated to go to bid in early Fall 2026, with construction starting in Winter 2026–27.
  • Northern Segment (Barton Springs Road to Montclaire Street):
    Expected to be sent to bid later, closer to 2030, as the southern segment nears completion.

 

Treadwell Connection Update

As part of preliminary engineering, the City requested approval from Union Pacific Railroad to connect Treadwell Street to South Lamar via either an overpass or underpass. Union Pacific denied both requests, so this connection has been removed from the current project scope.

While it is not included in the corridor program due to feasibility and funding constraints, it could be considered in the future if prioritized through local mobility programs.

 

About the Project

Current Work Zone

Location of Mary and Evergreen roundabout

Scope of Project

The new roundabout will:

  • improve safety and traffic flow at the intersection
  • Add pedestrian crossings at each leg of the roundabout
  • Include shared-use paths for people walking and biking

 

Construction Timeline & Impacts:

  • Work is expected to last through March 2026
  • Construction will take place at the intersection of Mary Street and Evergreen Avenue and will extend along each leg of the intersection along Mary Street and Evergreen Avenue
  • Access to homes and businesses will be maintained at all times
  • Drivers, cyclists, and pedestrians should expect phased lane closures and detours. Signage will guide all users safely around the work zone