I guess it depends on what you mean by "reliable". If you mean it won't crash more than a human, then we can pretty much do that under certain conditions. If you mean it will accept a trip 24/7 no matter the weather or road, it will take a while.
Do you have a source for this? Everything I can find is not apples-to-apples - they compare the reliability of a self-driving car under extremely careful and limited conditions, specifically by people who are developing, testing or evaluating the car... To the reliability of cars driving in snow, rain, glare, and operated by people with limited cognitive abilities and reflexes.
No, I was just going by what ma2rten said. But I think it is a fair comparison in the context of "show we allow this?". People drive in the rain at night without anyone considering banning it, so if we can make good-weather autonomous cars safer than that then it's good enough to start.
