[Metro-One]

You can be pro transit all you want but having your primary north south route (the 99) reduced to a single lane in one direction every weekday rush hour is asinine.

Tunnels and bridges need to be the widest points of roads, not the narrowest, for then they can properly act as regional and local routes.

And as also noted, even transit is horribly slowed using the tunnel in its current form, even with the que jumper lanes added.

Also a new structure would allow bike and pedestrian facilities to be added.

Add that with the age of low seismic grade of the structure, and it seems to me this is a pretty good case to build an 8 lane seismically sound structure with dedicated HOV / Bus Lanes with bike and pedestrian paths.