Waymo claims: "“Waymo provides more than 250,000 paid trips every week in some of the most challenging driving environments in the U.S..."<p>But also: "The company operates more than 1,500 vehicles across Los Angeles, San Francisco, Phoenix and Austin."<p>So not in the snow, ice, winding mountain roads, or any really "challenging driving environment"... more like flat city streets, hilly city streets, a desert, and giant, flat, sunny roads.