Status: Under Construction

August 27, 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.

South Lamar Corridor Improvements (Full Corridor)

Status: Pre-Construction

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):
  Bid solicitations began in July 2026; construction is anticipated to start in late 2026.
   
• Northern Segment (Barton Springs Road to Montclaire Street):
  Expected to be sent to bid later, closer to 2029, as the southern segment nears completion.

Mary Street Roundabout

Status: Complete

Work on the Mary Street roundabout was completed in spring 2026. See photos of the completed roundabout.

The new roundabout:

• Improves safety and traffic flow at the intersection
• Adds pedestrian crossings at each leg of the roundabout
• Includes shared-use paths for people walking and biking

Stormwater Improvements

Status: Under Construction

Construction is 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

Status: Pre-Construction

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.

Treadwell Connection Update

Status: Removed from Project Scope

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.