originated designated as National Freeway 1A, a branch of National Freeway 1. Initially a 4-lane highway, this section was eventually widened to 8 lanes in 2011 to alleviate traffic congestion. When the road was extended to Yingge to connect the newly constructed National Freeway 3 in 1997, the entire route was renumbered as National Freeway 2. In January 2006 Dazhu interchange was built to provide an easy access to the newly constructed Taoyuan HSR station. In April 2013, an interchange to the Wugu-Yangmei elevated road (), a local bypass to National Freeway 1, was built. The interchange allows westbound entrance for traffic to the airport and eastbound exit for traffic from the airport. On January 8, 2023, a spur route of the highway, known as Freeway 2A, connecting Freeway 2 and Provincial Highway 15, opened. See also Highway system in Taiwan References External links Freeway No. 02