Buses that serve surface streets in Downtown Seattle ( instead of the transit tunnel ) enter .
Buses that serve surface streets in Downtown Seattle ( instead of the transit tunnel ) exit the busway using S Royal Brougham Way and the bus only lanes on 4th Avenue S .
Buses that serve surface streets in Downtown Seattle ( instead of the transit tunnel ) enter and exit the busway using S Royal Brougham Way and the bus only lanes on 4th Avenue S .