It is a strawman argument to say, "humans are unsafe drivers, so it is better to replace them with robot cars that are not as unsafe". Most intelligent, aware and skilled human drivers are consistent too. I've driven well over a million miles over the last 25 years, including cross-country trips but mostly in the heavy traffic in and around NYC and Long Island. Zero accidents and zero moving violations. If we want to make driving safer the very easy answer is to remove people who are unwilling or unable to drive well and safely. Unfortunately, for a variety of reasons, our disfunctional government refuses to revoke the licenses from people who have proven they are unwilling and/or unable to drive safely and jail people who drive without a license. The 95 year old who lives down the block, cannot see over the steering wheel and regularly wrecks her car continues to drive. The 20 year old a block over who speeds around without a license plate on his car continues to drive. The 35 year old with 55 moving violations and a license that is suspended speeds through the red light on the corner every day. It isn't impossible to make our roads safer - or even difficult - we just lack the political will.