(Update: Stuck vehicles cleared, 99 still closed northbound)

2:58 PM: Just dispatched: Seattle Police and Fire units are going to the scene of a reported crash on Northbound 99 involving a motorcycle and car, not far from last night’s crash that killed a motorcyclist. If you’re heading toward downtown, avoid 99 for now – sounds like it’s about to be blocked off. More as we get it.

3:09 PM: Northbound 99 is now blocked off, per scanner traffic – as far south as, south of the West Seattle Bridge. At least one person is seriously hurt – they have already called for the Traffic Collision Investigation Squad, and that means it’s likely to be closed a few hours (last night’s crash investigation closed 99 for four hours).

3:16 PM UPDATE: Police are now describing this as a motorcycle/guardrail crash, not motorcycle/car. They are continuing to keep vehicle traffic from getting onto 99, but they are also trying to figure out how to get trapped traffic off the highway.

3:33 PM UPDATE: Adding “live” image of West Seattle Bridge, where this is causing a morning type of scene since the northbound 99 exit is closed TFN:

3:39 PM UPDATE: Police say the motorcyclist is dead – second motorcycle rider killed in a crash in this area in 17 hours.

4:50 PM UPDATE: Still closed – refresh this page for updated camera views above, especially the top one, which won’t show cars again on the right side until northbound 99 reopens. Southbound 99 *is* open. Meantime, buses are affected, says Metro: “Viaduct buses heading toward downtown Seattle are currently rerouted … and will travel via 1st Av S or 4th Av S depending upon the route and destination, with no missed stops. Expect delays in transit service.”

6:08 PM UPDATE: Northbound 99 is still closed, no ETA but we’ll be watching, and if you notice it reopened first, let us know, IF you are a passenger or else after you get to your destination.

7:22 PM UPDATE: As of a few minutes ago, as commenters have pointed out (thanks!), Northbound 99 has reopened.

9:32 PM UPDATE: Police have published an update on SPD Blotter, saying the victim was a 52-year-old man riding a 500cc Aprilia motor scooter.