 The US $426 million project opened to traffic in May 2014.The project was designed from the outset to be among the first all-electronic cashless toll roads in the United States with no traditional cash toll booths.183A Northern Extension
Also in 2010, the Mobility Authority began a project to extend the tolled lanes of 183A 5-miles (8.0 km) from FM 1431/Whitestone Boulevard to near San Gabriel Parkway in Leander.