Ask the experts. The biggest challenge we face is to stabilize the congestion, to contain it, fence it in and make sure it doesn't spill over into even more gridlock. By now you know the scenario. More gridlock means more sensible Puget Sounders will devolve into maniacal East Coast wannabees. Cars become weapons.
Tempers flare and guns wave.
Let's look at the reasons for the bad prognosis. Don't think so. There isn't the money, there isn't the environmental feasibility, and there isn't the community will. Imagine, for a minute, the costs and community rancor that would be expended to condemn land to build or expand highways. It never said it would.