For a fraction of the cost, make the carpool a dedicated bus lane with dedicated offramps and park and rides.

Light rail might be a good alternative if it was designed to get cars off the roads. Downtown to SeaTac does nothing for people in King, Pierce, or Snohomish counties. That line, even if expanded will have zero impact on people's commutes. 99.999% of the people still have no option with many billions spent. Where does the rest of the money come from to actually help move people along the major corridors people are using now?

Not quite sure what the reference to Fox has to do with anything.