10:24 PM: Have heard from a few people who apparently missed the previews and reminders about the current abundance of road work and were surprised by the bridge closures last night and tonight. In case you’ve been out of town, or busy, or lost track, this SDOT update from today explains what’s going on. Tonight is the only night the two bridge projects overlap, but if you are trying to get home from points eastward before 5 am or so, it will be tricky – you can’t get onto the westbound West Seattle Bridge from I-5 or Beacon Hill, and once you’re on, Delridge is the last open exit.
10:47 PM: As noted in comments, and in e-mail we received, try exiting at Harbor Island, BEFORE Delridge, for a reduced chance of getting stuck in a backup. One person who e-mailed points out that the detour signs do NOT offer this option (and also, as we’ve noticed, erroneously declare the entire WS Bridge closed).