MAX Light Rail, or Metropolitan Area Express, is a light rail system consisting of four separate lines (Blue, Green, Red, and Yellow lines) serving 87 stations in the Portland metropolitan area in Oregon. The system has had an average weekday ridership between 115,000 and 130,000 since Fiscal Year 2010. It is owned and operated by TriMet and began service in 1986. From its inception until 2004, about $3 billion was invested in light rail in Portland.
