(Portland, OR) -- TriMet has assigned a team of cleaners to focus on the transit agency's heaviest used and oldest transit centers. They're power washing, painting, and picking up litter at the stations. Many of them are 37-years-old. Crews are also replacing broken glass, signs and older bus shelters. TriMet has stationed end-of-line cleaners at seven key transit Centers and MAX stations where operators take their breaks. TriMet has doubled the number of Customer Safety Supervisors to increase security.