At first I was appalled at the idea of putting the burnside traffic through Couch in the brewery blocks, but Chris Smith makes excellent points about the current incentive for racing through Burnside. I think a better analogy for the couplet would be Broadway and 4th though, as they carry a heavy traffic load for through traffic as Burnside does, but Washington/Alder don't. I'm still concerned that couch is pretty narrow though, and unfortunately, you can't just shove 14 blocks of buildings over a lane or two. Since Couch has its own bridge over 405 already, I think I'd take the couplet all the way up to NW 23rd though.