Alef Aeronautics received approval to begin flying car tests at Half Moon Bay and Hollister airports this week, a step closer toward commercial production for what the San Mateo-based startup calls the world's first flying car. The company will start testing with its Model Zero Ultralight and later expand to other Model Zero prototypes and its $300,000 commercial Model A. Planned testing will include driving, vertical takeoff, forward flight, vertical landing and ground and air maneuvering.