(99 at S. Atlantic. You should see NB traffic on the right through the weekend, but no SB traffic on the left)
WSDOT is scheduled to be closing Highway 99 right now for a weekend of preparations preceding a year-plus of work to rebuild the so-called “Timber Bridge” section south of the West Seattle Bridge. Here’s what’s closed:

NORTHBOUND 99
*Only closed from S. Nevada to the WS Bridge – the exit from the eastbound WS Bridge WILL stay open and you CAN go NB on 99 from here

SOUTHBOUND 99
*Closed from the Battery Street Tunnel to S. Nevada, so this weekend you CAN’T get to the West Seattle Bridge from SB 99

DETOUR MAP
*See it here

TRAFFIC PATTERN WHEN THE CLOSURES END MONDAY MORNING
*The “Timber Bridge” will run two northbound and one southbound lane throughout construction. Here’s a look at how that’s supposed to work.