Lime, the $2.4 billion scooter and bicycle startup, is raising another mega-funding round, just months after announcing its $300 million series D, according to people familiar with the matter. The 2-year-old company, whose green and white electric scooters can be found on public sidewalks from Oakland, California, to Auckland, New Zealand, could raise as much $500 million, the people said. The company has spoken with multiple possible investors, including the deep-pocketed SoftBank Vision Fund, they said.