As I've followed these developments and those of Google and Tesla I've been wondering at times if I live in some alternate universe. The level of diligence and care that must go into systems which have the potential to maim an kill are nothing to laugh at. They require serious engineering which takes time. You can find the best and smartest humans on the planet and they'll still fail at building reasonable controls for life critical systems in controlled environments. When you are building these controls for life critical systems which will operate in the diversity of our roadways, honestly the task gets very hard.
I'm not against progress and I do think that self-driving cars are the future. However, it may be wise for those trying to march towards that future at breakneck speeds to take a step back and consider that these systems should first be implemented as backups to humans. Develop the solutions through preemptive braking and accident avoidance where humans are still very much engaged in the driving activities or focus on building expertise in controlled environments. On that note, kudos to Google for doing just that. Their first phase has focused on low speed situations and have been restricted very much to lab work whereby they have paid employee's serving as observers and backup.