Riding shotgun in a DIY self-driving car

The reason Hotz is telling me he's an idiot -- while dressed out of character, no less -- is that he set up test drives for reporters in Las Vegas without doing all of his homework. He didn't realize that Sin City doesn't use white lines to outline lanes. Instead, the state uses raised markers called botts dots instead of paint. That's a problem: The Comma test vehicle has never driven on roads with bumps instead of paint. Hotz was so worried about this that he barely slept the night before.