sentences:  In 2004, it was decided to add MAX light rail to the transit mall, as TriMet's existing MAX routing through downtown was nearing its design capacity and another line (the Green Line) was being planned and was expected to be added to the system within a few years.Also, the mall was approaching three decades of use, and was in need of a heavy renovation.TriMet and transportation planners from the city and Metro studied how best to accommodate both buses and light rail on the mall.