as follows: Brown Beaver, Green Leaf, Yellow Rose, Orange Deer, Red Fish, Purple Raindrops and Blue Snowflake. They were also called "sector symbols", as each one corresponded to a particular sector of the city, e.g., the Rose being for routes serving Southwest Portland and the Fish for North Portland routes. When TriMet's first light rail line opened in 1986, use of the Snowflake symbol on the mall was discontinued, as all TriMet routes in that sector were curtailed to terminate at a light rail station, such as the Gateway Transit Center, and no longer traveled to downtown. This operating configuration for the Portland Mall remained largely unchanged for 29 years, before the mall closed for rebuilding in early 2007. TriMet discontinued use of the distinctive graphic symbols used at mall stops at that time, but the symbols had already been relegated to secondary status in 2002, when they were replaced by purely geographic, letter designations such as N or NE (for North Portland or Northeast Portland) for each grouping. The graphic sector symbols were retained only at a greatly reduced size on the mall signs (much smaller in size than the new letter indications) and were no longer used at all in other TriMet media, such as the covers of bus schedules. They disappeared entirely in January 2007. Renovation and rebuilding 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. During this process, it was also decided, at the urging of the downtown business community, to reconfigure the mall's traffic lanes in such a way as to permit autos and other private traffic to use the left lane for the entire lengths of 5th and 6th avenues, a controversial decision. The project would also extend the mall south, from Madison Street all the way to the southern end of downtown and of Fareless Square, at the Stadium Freeway (I-405), thereby reaching Portland State University. The Portland Transit Mall temporarily closed for rebuilding