Daisuke Wakabayashi has a big scoop for the WSJ:
Apple Inc. has tapped a highly regarded senior executive who helped bring to market many of Apple’s signature products to oversee its fledgling automobile project, according to people familiar with the matter.
Bob Mansfield had stepped back from a day-to-day role at the company a few years ago, after leading the hardware engineering development of products including the MacBook Air laptop computer, the iMac desktop computer, and the iPad tablet. Apple now has Mr. Mansfield running the company’s secret autonomous, electric-vehicle initiative, code-named Project Titan, the people said.
As John Gruber writes, this news is a telltale sign Apple is serious about "Project Titan."
See also: My piece from last year wherein I speculate on the accessibility of an Apple-branded car.