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The MAX Yellow Line is a light rail line serving Portland, Oregon, United States. Operated by TriMet as part of the MAX Light Rail system, it connects North Portland, Portland City Center, and Portland State University (PSU). The line serves 17 stations; it runs north–south from Expo Center station to PSU South/Southwest 6th and College station, interlining with the Green and Orange lines within the Portland Transit Mall. Service runs for 21 hours per day with headways of up to 15 minutes. The Yellow Line is the fourth-busiest service in the MAX system; it carried an average 12,960 riders per weekday in September 2019.
After failing to secure funding for the South/North Corridor project, a planned light rail line between Clackamas County and Clark County, Washington, Portland business leaders and residents convinced TriMet to revive a portion of the project within North Portland along the median of Interstate Avenue. The ten-station, 5.8-mile (9.3 km) Interstate MAX extension began construction in 2001 and opened to Yellow Line service on May 1, 2004. From opening until 2009, the Yellow Line ran from Expo Center station in North Portland to the Library and Galleria stations in downtown Portland. In 2009, TriMet rerouted downtown Yellow Line service to the Portland Transit Mall.
Since 2015, the Yellow Line has operated as a northbound through service of the Orange Line from PSU South/Southwest 6th and College station. Conversely, most southbound Yellow Line trains, which had served the other half of the transit mall on 5th Avenue from 2009 to 2015, operate through to the Orange Line from Union Station/Northwest 5th & Glisan Street station.
- ^ a b "Interstate MAX Yellow Line" (PDF). TriMet. July 2016. Archived from the original (PDF) on July 10, 2018. Retrieved February 23, 2019.
- ^ "September 2019 Monthly Performance Report" (PDF). TriMet. p. 1. Archived (PDF) from the original on April 26, 2020. Retrieved January 9, 2020.
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