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5:15. Sandy Mathews, 32, an environmental analyst at the lab, drives back to the BART station, picking up LeeAnne Mila, 32, on the way. I press them on the presets issue. Mila says it never comes up. Everyone listens to NPR.
5:50. Roy Florey, 44, gets off the BART train, returning from his job as a hospital auditor in Oakland. He climbs into car F for his trip home. His 17-year-old son just got a driver's license, and car sharing saves Florey from having to buy another car.
6:20. Car F coasts into Florey's driveway in Livermore. The communal bond the CarLinkers have formed strikes me as almost quaint. Florey admits he initially thought the car-sharing idea "sounded pretty weird." But now he's a believer. "At this point," he says, "I would be happy to share all of my cars."