If you thought the condemnation of the South Park Bridge was a tragedy, wait until the Alaskan Way Viaduct crumbles to the ground. At that moment, you will hear the collective wails of tens of thousands of West Seattleites (and Burienites!) who've just witnessed the death of their earthbound commute as they know it. Yeah, there's the water taxi, but unless the county bucks up for a second boat, a proper park & ride, a round-the-clock schedule, and better bus service to the dock, it'll only ever solve a small piece of what promises to be a massively frustrating puzzle. So what to do? Here's what: Summon the political will to take Mike McGinn up on his proposal to expand light rail to West Seattle as soon as possible. This was a good idea even before the viaduct became a life-or-death issue. Get those trains to the peninsula, stat! ?Mike Seely