So, you think to expand to a new city Waymo has to figure out if there are any edge cases in that city, train CNN for the new edge cases - and change their planning code - apart from generating HDMaps and manually annotating the path the car should take on every road / parking lot ?
As Waymo gains more and more experience, and solves more and more edge cases, their autonomous driving will work reliably in more and more places. It will take less and less time to expand to the next city.
Whenever Tesla gets to L4/L5 robotaxi in US - within a year or two they will expand to EU, China etc where they sell cars now.
Unlikely. Even if Tesla solves L4/L5 in the US, there are regulatory hurdles in the EU, not to mention different roads, different traffic rules in both the EU and China. There will be entirely new edge cases. To get L4/L5 working in the EU and China will require more retraining of the NN. It won't happen in one year.
What are the HD maps various autonomous ventures are now using ? I'm guessing they are very detailed not that 40 cm accuracy ones.
I don't know for sure but the accuracy is probably around 1-10 cm. So they are more accurate than Toyota's 40 cm HD map.