sentences:  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.