No big splashy announcements of this closure yet but it hit our radar when Robert asked a question on the WSB Facebook page: The Alaskan Way Viaduct will close for much of Saturday because of this area’s first-ever Rock ‘n’ Roll Marathon. Specifically, it’s slated to close 4 am-4 pm northbound, 4 am-1:15 pm southbound; the times are listed on The Viaduct’s website.