You overstate what data is available. What self-driving cars are currently operating in icy/snowy/rainy conditions on poorly maintained roads that aren't radar-

You overstate what data is available. What self-driving cars are currently operating in icy/snowy/rainy conditions on poorly maintained roads that aren't radar-mapped to the inch? In any case, avoiding hitting people and other cars is the easy part of building self-driving vehicles. Navigating in ever-changing uncertain road conditions reliably is a different problem altogether.