Welcome to the

183A Phase III Project

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 6.6-miles northward in Williamson County as Phase III of the 183A system to accommodate future traffic volumes and reduce anticipated traffic congestion.