sentences:  Between fall 2009 and July 2014, the Portland Vintage Trolley also served the transit mall on certain Sundays.Although the mall's stops are mainly served by TriMet vehicles, on weekdays buses on express routes operated by C-Tran and the Columbia County Rider also serve the mall.In September 2015, the new MAX Orange Line replaced the Yellow Line service in the southbound direction on the mall, on 5th Avenue, with the Orange and Yellow lines being through-routed at all times.