(Caltrans) O ur Bay Curious audience is a reliable source of questions about transportation, whether we're talking about walking, bicycling, riding on public transit or driving on local highways. This week, we've got two questions — both voted up by you, the people — that come from the world of Bay Area freeways. First, Herb Masters, a San Carlos resident, asked what was up with what we'll call for now "a ghost freeway" that appears to have been started, but never finished, on the Peninsula. And second, we have a question from Daniel Huertas of San Francisco, who wants to know: Why is there so much trash on our freeways? And is it just him, or are Bay Area freeways really getting dirtier?