11:35 PM: Northbound Highway 99 is closed in the stadium zone because of a crash involving a motorcycle. Police have closed the ramp from the eastbound West Seattle Bridge, too, since there’s no place to detour before that. Per radio communications, they’re working now to figure out how to reroute the traffic that is already on 99 and now stopped. The closure is likely to last a while, as the Traffic Collision Investigation Squad has been dispatched.
12:27 AM: The motorcycle rider was killed, according to SFD.
NOTE: Official updates have been scarce so far, so the highway might reopen before there’s official word; if you’re heading out early and want an update, you can check this camera to see if traffic has resumed on NB 99.
5:12 AM: According to citywide media, 99 has reopened.
10:56 AM: More details now via a report on SPD Blotter – the rider was a 34-year-old man pronounced dead at the scene (not yet identified by name); police found no evidence that another vehicle was involved, but believe speed was a factor.