Tesla CEO Elon Musk unveiled the second phase of the electric carmaker's "master plan" on Wednesday, outlining a future in which individuals use solar power to provide their own energy, automated vehicles replace heavy-duty trucks and buses, and self-driving technology that could be "10 times safer than the U.S. vehicle average" becomes pervasive. Musk's plan, drawing on projects he's backed for years, represents an ambitious, public mission statement for a man and company known to reach for the improbable. "The main reason was to explain how our actions fit into a larger picture, so that they would seem less random," Musk wrote on Tesla's blog, noting that the company's first "master plan," was posted 10 years ago. "The point of all this was, and remains, accelerating the advent of sustainable energy, so that we can imagine far into the future and life is still good," Musk wrote. It's not some silly, hippy thing? it matters for everyone."