Alaskan Way lanes have changed to a “long-term temporary configuration”.
Jasmine Beverly at Alaskan Way Viaduct Replacement Program says,
We posted a bike-specific map on our website for showing route options coming to and from the Elliott Bay Trail. These routes will not change during the SR 99 closure. There are more bike options northbound than southbound, as there is now a local-access lane northbound under the viaduct that people can ride heading north. The main southbound options between Yesler Way and South King Street are the sidewalk on the edge of the water, or riding in the general traffic lanes.
The new Alaskan Way alignment that we instituted earlier this month is a long-term temporary configuration that allows Alaskan Way to remain open while we remove the viaduct nearby. There will not be any bike lane as part of this temporary configuration. After we remove the viaduct, the City of Seattle will rebuild the waterfront with a new Alaskan Way that includes a protected bike lane.