Sound Transit Board approves Spring 2024 opening for East Link starter line

East Link testing on 112th Ave SE, photo credit the author's wife

The Sound Transit Board green-lighted the much-anticipated East Link Starter Line (ELSL) earlier today, approving a resolution that authorizes up to $43 million on implementing passenger revenue service in Spring 2024. Previously, the Board had approved $6 million to study the idea of a phased East Link opening, per the urging of King County Councilmember Claudia Balducci.

Earlier in the year, boardmembers representing Snohomish County had expressed concern that opening the ELSL in 2024 might detract from a timely opening for the Lynnwood Link Extension (LLE). However, Sound Transit staff determined no schedule impacts from the ELSL on the LLE, which is on track for a Fall 2024 opening. Nonetheless, Lynnwood Link is expected to operate at lower frequencies until the I-90 connection to the Eastside operations and maintenance facility (OMF) is complete.

With the ELSL's approval, service levels will be formally laid out in the 2024 Service Plan, which is anticipated for a board vote later in October. In the meantime, initial readiness plans call for a 16 hour service span with constant 10 minute headways across the day using 2-car trains.

The ELSL will also only operate between Redmond Technology Station (serving the Microsoft campus) and South Bellevue Station. Since it does not directly duplicate any existing services, it remains to be seen whether or not Sound Transit will adjust service levels on the 550 or 556 when the starter line opens.

Ridership on the ELSL is forecasted at 6,000 daily boardings. Given the ubiquity of remote work and ample parking along the corridor, I expect ridership to be relatively muted until the I-90 connection is complete and Bel-Red is more fully built out.

Although East Link and the year 2023 have suffered an irreparable divorce, it's encouraging to see the ELSL come to fruition, thanks to hard work from Sound Transit staff and championing from councilmember Balducci.