By now, it is likely that you have spent at least a bit of time familiarizing yourself with some of the pros and cons of Proposition 1A, the proposed $10 billion bond measure on the Nov. 4 election ballot. It is no secret that the grandiose plan for a high-speed rail setup linking San Diego, Los Angeles, Sacramento and San Francisco _ and certain points in between _ has its detractors. And the list is growing as the economy falls deeper into recession. California’s fiscal problems are bad and getting hairier. The timing of Prop. 1A could not be worse. But there’s more. San Mateo County, as we have noted recently, will be severely impacted by the planned system in ways even its proponents can’t describe with any real accuracy. There are lots of unanswered questions for those living on the Peninsula. And how about this one: Why would anyone seriously contemplate implementing not one, not two but three separate rail lines stretching from Millbrae to San Francisco? That’s right, three: BART, Caltrain and the new high-speed arrangement. A minimum of six tracks, plus a special set to San Francisco International Airport. Can you say utterly redundant and a waste of taxpayers’ money? Amazing.