A day after Allison Bayliss' bicycle was uncovered in a parking lot by the Golden Gate Bridge, police and local park rangers have ramped up their efforts to find the missing Danville teen. Currently their searching trails, beaches, and bluffs in Ocean Beach and the Marin Headlands, US park ranger Howard Levitt told KTVU News this morning. They've scrutinized Alison's Facebook page for clues, and sent boats out to troll the San Francisco Bay. So far, their efforts have paid off. A friend of the family told reporters at Walnut Creek Patch that Levitt said that a careful perusal of Alison's computer yielded Google Maps bicycle directions to Dublin BART station, the Embarcadero, and the Golden Gate Bridge — which was how they found the bike yesterday. Rescue teams set out at 5 a.m. this morning, and will continue working through the afternoon.