 CT and First Transit signed their third and most recent contract in 2007 , continuing the latter 's operation of CT commuter service to Seattle . Community Transit debuted the first double @-@ decker buses in the Puget Sound region during a year @-@ long test in 2007 , eventually buying its own fleet of Alexander Dennis Enviro500s for its " Double Tall " fleet to be used on commuter services . A PTBA expansion into the unincorporated areas of Cathcart , Clearview and Maltby was attempted during the 2008 general elections , but failed to gain a majority vote . In November 2009 , after three years of planning and a year of construction , Community Transit debuted the first bus rapid transit line in Washington , Swift . The service replaced Route 100 on State Route 99 between Aurora Village in Shoreline and Everett Station , featuring 12 @-@ minute headways , off @-@ board fare payment and transit signal priority . 
