January 14 to January 17, Southbound SR99 will be closed between the Battery St Tunnel and West Seattle Bridge from 10 PM to 5 AM the following morning. The Elliott Ave and Columbia St onramps will also be closed. One lane of northbound SR 99 will be closed from S Holgate St to S Royal Brougham Way during these times.
You’ll recall these closures were frequent for a few months last year; we’ll check with WSDOT tomorrow to see if this is isolated, or the start of a new wave of shutdowns.
12:08 PM: Thanks to Travis Phelps at WSDOT for adding the info in comments – before we even had sent the inquiry – that this will be happening the next three weeks.