Construction on the $259 million 183A Toll Phase 3 project located north of Leander was about 40% completed as of December, said Mike Sexton, acting director of engineering at the Central Texas Regional Mobility Authority.

Structural and concrete work, such as retaining walls and bridges, are being built, and in 2023, work on Hwy. 29 to build a 30-foot-deep underpass will begin.

Drivers will begin to see the effects of this construction on Hwy. 29 in early 2023, and it will continue for about a year until work on the highways is completed, Sexton said.

Once completed, the 6.6-mile extension from Hero Way to Hwy. 29 will consist of two tolled lanes in each direction located mainly within the existing US 183 median. The project will also include shared-use paths, according to CTRMA documents.

Construction on Phase 3 began in April 2021, and the road is expected to open in early 2025. The project aims to save commuters time and eliminate the use of signalized intersections.

Phases 1 and 2 of the 183A Toll system extend from RM 620 in Austin to RM 1431 in Cedar Park and from RM 1431 to Hero Way in Leander, respectively.

The Mobility Authority will host an informational community event in Leander’s Summerlyn neighborhood Feb. 4.