> These statements are inherently ignoring the externalities that the dangers pose to others on the roads and streets. No, they don't. We don't ban alcohol or

> These statements are inherently ignoring the externalities that the dangers pose to others on the roads and streets. No, they don't. We don't ban alcohol or cars because of drunk drivers. We don't even require a breathlyzer reading before cars start. Instead, we try to discourage that behavior with education and penalties. We penalize drunk drivers after they harm other road users or we try to catch them beforehand based on driving irregularities. I do suspect we will see restrictions on what software can be run on cars. I hope those restrictions allow open source solutions to be viable. Ideally there would be a cost effective federal system of safety approval for any release of self driving software and we'll allow users to run any approved system on publix roads so that ownership of devices isn't lost. Unfortunately I think regulatory capture makes a positive outcome here unlikely.