Ehang's 184 drone, shown here at CES earlier this year, will be flight tested in Nevada View gallery The idea of personalized air travel aboard autonomous flying taxis sounds like a pretty fanciful transport concept, but it started to get some serious traction when Ehang's 184 drone landed at CES earlier this year. Many questions remain over how the human-carrying aircraft would function in the real world, but at least some of these may soon be answered with the company winning governmental approval to test the vehicle in Nevada airspace.