The Metro Rail Transit Line 3, also known as the MRT Line 3, MRT-3 or Metrostar Express, is a light rapid transit system line of Metro Manila, Philippines. Originally referred to as the Blue Line, MRT Line 3 was reclassified to be the Yellow Line in 2012. The line runs in an orbital north to south route following the alignment of Epifanio de los Santos Avenue (EDSA). Although it has the characteristics of light rail, such as with the type of rolling stock used, it is more akin to a rapid transit system owing to its total grade separation and high passenger throughput.