The MAX Orange Line is a light rail service in Portland, Oregon, United States, operated by TriMet as part of the MAX Light Rail system. It connects Portland City Center to Portland State University (PSU), Southeast Portland, Milwaukie, and Oak Grove. The Orange Line serves 17 stations from Union Station/Northwest 5th & Glisan to Southeast Park Avenue and runs for 201⁄2 hours daily with a minimum headway of 15 minutes during most of the day. The line carried an average of 3,480 daily weekday riders in September 2020. The Portland–Milwaukie Light Rail Project was the second and final phase of the South Corridor Transportation Project that in its first phase expanded light rail services to Interstate 205 and the Portland Transit Mall. The Portland–Milwaukie extension, which followed years of failed light rail plans for Clackamas County, began construction work in mid-2011. As part of the project, TriMet built Tilikum Crossing over the Willamette River, the largest "car-free" bridge in the United States. The extension opened to Orange Line service on September 12, 2015.
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