operates MAX light rail on two alignments in downtown, one running east/west on Yamhill and Morrison streets and north–south on 1st Avenue, the other running north–south on 5th and 6th avenues. On the latter two streets, an extensive transit mall—known as the Portland Mall—limits private vehicles and provides connections between more than fifty bus lines, MAX light rail, and the Portland Streetcar. The southern part of downtown and the West End are also served by the Portland Streetcar system, operating from South Waterfront north into the Pearl and Northwest Portland districts. The system currently has two routes, measuring end to end, and connects in South Waterfront with the Tram (aerial cableway) to Oregon Health & Science University (OHSU). Starting in 1975 and continuing for almost four decades, all transit service in downtown was free, as downtown was entirely within TriMet's Fareless Square, which also covered a portion of the nearby Lloyd District after 2001. However, in 2010, free rides became limited to MAX and streetcar service – no longer covering bus service – and the zone renamed the "Free Rail Zone", and in September 2012 the fareless zone was discontinued entirely, because of a $12 million shortfall in TriMet's annual budget. Sites of interest Pioneer Courthouse Square Arlene Schnitzer Concert Hall Portland Art Museum Portland State University Oregon Historical Society Tom McCall Waterfront Park Buildings Several high-rise buildings are located in downtown Portland. The five tallest are: Wells Fargo Center: rises to 166 meters (546 feet) and was constructed in 1972 U.S. Bancorp Tower: rises to 163 meters (536 feet) and was constructed in 1983 KOIN Center: rises to 155 meters (509 feet) and was constructed in 1984 Park Avenue West Tower: rises to 153 meters (502 feet) and was constructed in 2016 PacWest Center: rises to 127 meters (418 feet) and was constructed in 1984 Adjacent districts Old Town Chinatown – northeast, and extending south of West Burnside St. near the river Pearl District – north, adjacent to Chinatown Goose Hollow – residential, west of PSU, north of US 26 Southwest Hills – residential, west of PSU, south of US 26 Marquam Hill (colloquially "Pill Hill") – south, including OHSU and the Veteran's Hospital RiverPlace – at southeast corner of downtown South Waterfront – south of downtown, east of Interstate 5 See also Mount Hood Freeway Portland, Oregon neighborhoods References External links Portland Downtown Neighborhood Association Official City of