Most of our buses can hold 3 right now. They upgraded a bunch of buses to 4 bike racks and the racks began to fail , so they had to put the 3 up ones back.
I'm not over enamored with our transit system out here. It's OK... but it is mostly bus based (light rail is coming finally....) In the city I can get around faster on my bike than I can by bus - my 25 min 6 mile bike commute is an hour with one transfer if I take the bus...
If you really do need to do inter-city commuting we do have a nice heavy rail (shares with Amtrack) commuter run along Tacoma - Seattle - Everett that would certainly beat driving those distances.