Pittsburgh, where Uber's ATC is based, is another profoundly challenging environment— there are a lot of curvy cobblestone streets with >10% grade that haven't

Pittsburgh, where Uber's ATC is based, is another profoundly challenging environment— there are a lot of curvy cobblestone streets with >10% grade that haven't been maintained in decades. And the weather is often snowy or sleety or otherwise unfriendly.