There will be a separate app for auto-steering in every set of road conditions imaginable. If you want to be safe, all you have to do is to find the right app out of 100's of thousands that's highly rated and doesn't crash.
Seriously, I think there will be a change in scope and timing with regards to the roll-out of automated vehicles. I suspect it will happen first with trucks and buses in contexts with limited exposure to urban traffic.
