National Freeway 2 begins as an 8-lane highway (4-lane in each direction) at Taiwan Taoyuan International Airport in Dayuan.

In Luzhu, the freeway intersects Provincial Highway 31, which provides access to the nearby Taoyuan HSR station.

Initially a 4-lane highway, this section was eventually widened to 8 lanes in 2011 to alleviate traffic congestion.

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 (Chinese: 五股楊梅高架道路), a local bypass to National Freeway 1, was built.