Waymo CEO John Krafcik posted a tweet with an image of the Waymo Chrysler Pacifica minivan, kitted out with its in-house self-driving sensor technology, in a snowy setting at South Lake Tahoe in California. The Lake Tahoe location keeps Waymo within the domain of its license to test autonomous systems on state roads, but also provides snowy environs to test more extreme conditions and help it build out its flexibility in terms of weather conditions.