183A Phase III Underway

March 9, 2023

Written by Barbara Colvin

Categories: Uncategorized

With unprecedented growth in Williamson County, most notably in Cedar Park, Leander, and Liberty Hill, traffic volumes along US 183 are anticipated to increase by 183 percent by 2042, driving the need for proactive congestion relief.

Construction began in spring 2021 to extend the 183A Toll Road northward into Liberty Hill as Phase III of the 183A system to accommodate future traffic volumes and reduce anticipated traffic congestion.

The Central Texas Regional Mobility Authority is extending the existing 10-mile 183A Toll Road 5.3 miles northward from Hero Way to north of SH 29 as Phase III of the 183A system. Together with the associated access ramps, frontage road improvements and transitions, the overall project length will be approximately 6.6 miles.

The project will include two tolled lanes in each direction located primarily within the existing median of the US 183 corridor, with an adjacent shared use path from Hero Way to Seward Junction Loop.

Extending the existing 183A Toll will:

  • Save commuters time
  • Provide a reliable transportation option
  • Eliminate the need to use signalized intersections
  • Minimize community impacts by working within existing right-of-way.
  • 183A Phase II. A 5-mile extension northward from RM 1431 to Hero Way. The extension opened in April 2012 and resulted in a significant shift of traffic from the non-tolled frontage roads to the new tolled mainlanes.
  • Intersection Improvements. Non-tolled operational improvements and enhancements to the US 183/183A (North) intersection were delivered in 2015 to make the intersection safer and easier to navigate and to enable better access to developments along 183A.
  • Bicycle & Pedestrian Facilities. The 183A Toll shared use path includes a 10-foot-wide, 7-mile long dedicated bicycle and pedestrian path that borders the 183A facility from South Brushy Creek to Hero Way. It also includes a trailhead and pedestrian bridge that crosses Brushy Creek, as well as a connection to Williamson County’s Brushy Creek Regional Trail. Phase III of the 183A system will extend the shared use path north from Hero Way to Seward Junction Loop.
  • For more information on the existing 183A Toll Road, visit the Mobility Authority’s website


Learn more about the new toll here

Source; 183A Mobility Authority

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