Google continues to release more details about their autonomous car plans, as other carmakers ramp up their efforts and regulators try to finish drafting the laws that will govern their use on California roads.

The latest announcement that Google had decided to build its own car rather than hacking existing vehicles is not unexpected, but it is interesting. The company's vision is far-reaching, but it is going at the problem incrementally. Their prototype self-driving car would be an electric-powered subcompact with a battery range of 100 miles and no plan for human control.

Following the news, there was a conference call early this morning in which Google's self-driving car lead, Chris Urmson, and its head of safety for the project, former National Highway Traffic Safety Administration deputy Ron Medford, answered questions from reporters across the globe. Below, you can find a selected set of questions and answers from that event, edited for clarity and length.

I don't normally provide close-to-verbatim transcripts of events like this. But this period of time for this particular technology requires exceptional measures. We are witnessing the development of a truly consequential technology, and I see our job here as documenting what people said was going to happen.