The Downtown Seattle Transit Tunnel will be closed for the next two weekends (May 30-31 and June 6-7) to allow further preparatory work for U-Link. Per Bruce Gray at Sound Transit:

Similar to what we did in the Beacon Hill tunnels in March, we’re testing the newly upgraded fire/life/safety and train control systems in the DSTT over the weekend of the 30-31. The following weekend, if all goes well, we will make the final switchover from the old to the new systems in the DSTT and integrate with U-Link ventilation control. Finishing this upgrade is an important step towards connecting all tunnel systems later this summer and being ready for more intense testing scheduled through the fall.

Link Light Rail will only run between Stadium Station and SeaTac Airport Station, and will serve all stations in between. A free shuttle (route 97), as well as regular routes 101, 106, 124 and 150, will serve the bus stops closest to Stadium Station and SODO Station. All the tunnel buses except route 255 will run on 2nd and 4th Ave through downtown. Route 255 will run on 4th and 5th Ave. Route 97 will run on 3rd Ave. A full list of stop locations for the re-routed tunnel buses is here.

The Mariners will be playing here both of these Saturdays and Sundays. The Sounders will be hosting the New York Red Bulls at 2 pm on May 31. Three-car Link trains will be running all day on the 31st. Sounder will be serving the simultaneous Sounders and Mariners games on May 31, and the Mariners’ game on June 7.