A self-driving car may someday have to decide between your life and the lives of others. But how should the car choose? If you don’t know how to make that decision, that’s okay — Washington doesn’t either.

That’s one big takeaway in a new, lengthy document from the Department of Transportation that lays out options to make autonomous vehicles safer–and represents the most public sign of the attention self-driving cars are getting from politicians despite their inability to vote.