This might be a little more gut reaction than normal but why in the heck would you get rid of trolley buses in Seattle? Honestly when everyone else is looking for ways to get on renewable energy and figure out ways to lower carbon footprints, you're going to really add more ghgs to save a little coin? When do we start pricing carbon so that these actually make Metro money?
This is a case where the bean counters are counting the wrong beans. The metrics they used are out of touch with what's going on in the world today and the whole host of externalities that bean counters are not generally meant to measure till they are forced to. I can tell you that the dismantling of the Milwaukee Road was the dumbest thing right before an oil crisis. He who does not learn from history is doomed to repeat it. I find it interesting that these studies keep coming out decade after decade against electric transport on cost or other issues. Edison's battery for cars seemed to be taken out this way, the Milwaukee Road got taken out this way, and now the Seattle Trolley buses might get taken out this way. I want to see a diesel vs. trolley bus test up a hill. Stop the insanity.