In December 2018, The CTA Board approved $2.1 billion worth of contracts for the modernization of the Red and Purple Lines. The largest and most expensive in CTA history, this project includes the construction of a bypass that allows Brown Line trains to travel above Red and Purple Line trains on the city's North Side, and the reconstruction of the Lawrence, Argyle, Berwyn, and Bryn Mawr stations. Construction of the project began on October 2, 2019 and is scheduled for completion in 2025. $100 million in federal funding for the reconstruction of the Red Line was approved September 2019. In the final days of the Barack Obama administration, the federal government agreed to provide $957 million in funding in total; the rest would come from a tax hike on property owners who lived within of the Red Line.