Reminder from the Alaskan Way Viaduct south-end replacement team: The weekend closure of the southbound SR 99 Alaskan Way Viaduct off-ramp to First Avenue S. starts at 7 tonight, and when the ramp reopens by 5 am Monday, it’ll put you onto Royal Brougham, not 1st Avenue South. Also in the announcement:

Starting Monday, drivers will be able to use a new street connecting S. Royal Brougham Way and S. Atlantic Street between First Avenue S. and Alaskan Way S. The new street is temporarily called East Frontage Road S.

Then as of 7 pm next Friday (February 18th), the northbound Alaskan Way Viaduct onramp from 1st Avenue South will close for up to six weeks. That closure will kick off with a surface-street closure too:

With the exception of access for local businesses, the following streets will be closed from 7 p.m., Friday, Feb. 18 until 5 a.m. Tuesday, Feb. 22:
* First Avenue S. between S. Royal Brougham Way and S. King Street
* Railroad Way S. between Occidental Avenue S. and S. King Street

All this is explained here. But wait – there’s more:

Starting Monday morning, Feb. 14, both directions of Alaskan Way S. between S. Atlantic Street and S. Royal Brougham Way will be closed to traffic until 5 a.m. Monday, Feb. 21.

We’ll provide drivers with a signed detour around the closure via the new East Frontage Road S. Learn more about the detour and the reason we’re closing Alaskan Way S. on our website. The Alaskan Way S. bike and pedestrian path will remain open during the closure.

At 5 a.m., Monday, Feb. 21, one southbound lane will reopen. All northbound lanes will remain closed through 2013 while crews incorporate the area into our existing long-term construction zone.