They tested in Buffalo last year and have in tested Michigan.

https://www.wkbw.com/news/local-news/inside-the-self-driving...

Didn’t know that. Good for them!

Even if they never actually solve winter driving, they could just… not drive during the winter?

If there’s a high probability of below freezing temperatures, cars can just make their way out of the city to some parking lot to hunker down.

Or move them elsewhere in the country during the winter months.

Having a seasonal service is not a bad idea. The big problem with that is cutoff times. Too early and people will complain when they can't get a ride when no snow is on the ground. Too late and you're liable for everything that happens when the road is covered in thin ice or sleet, including leaving someone stranded. You will need very accurate weather predictions for operating over the winter months.

Probably just don't have them drive during snowy conditions. Roads are fine almost all the time during normal hours

GM and Ford do quite a lot of self-driving testing in Michigan.

downshifting? these are all electric vehicles IIUC