The Headline Doesn't Match the Story

Ok, can someone tell me if I'm going crazy here? First the misleading PI headline:

Study: Surface-transit would clog regional traffic

Then the FIRST paragraph:

The state's plans for a tolled deep-bore tunnel to replace the Alaskan Way Viaduct would bring slightly more traffic congestion to downtown Seattle than a surface-transit concept favored by Mayor Mike McGinn, according to an analysis in the tunnel project's Final Environmental Impact Statement

So the tunnel would bring more traffic to the surface streets right?  Then later on:

With no place for all 110,000 vehicles to go, speeds would decrease and fewer drivers would travel through Seattle's city center, resulting in less traffic, according to an analysis in the environmental assessment.

The idea is that surface transit would make through traffic harder, and people would be annoyed and say I'm not going to make that trip.  That is a great result!  But that headline suggests that it would clog traffic all together when that is not the case.  I'm guessing some headline writer at the PI thought it would be good, but it totally shows some serious windshield perspective.