Tioga pass is closed in the winter so I don't think any vehicle short of a snowcat could make it . Also detecting and avoiding avalanches is not something that anyone is working on for autonomous vehicles.Sure, those are good. Even very good. But the weather is perfect; and all in the day time.
Before lots of people will give up their cars and get in the back seat of robotaxi it has to work all the time.
Many people would give up working in every location -- as long as it works around home for commuting and shopping.
Do you think these are good enough, today or in 2019, to drive in the snow at night over Tioga pass?
I have no idea how well Cruise's vehicles work in the snow or rain. They do most of their testing in San Francisco so I bet they work pretty well in the rain. I've seen video of them driving at night.
Tesla claims that their system will work everywhere and in all weather conditions by the end of next year.
Speaking of driving at night, I found this pretty hilarious: (at 31:27 it seems to strip time links)