Self-driving cars and learning to drive on the other side of the road

Waymo now testing its self-driving cars on public roads with no one at the wheel

So now, cars have learnt to drive on public roads in the United States.

The question, though, is how easy it willl be to train these cars, originally trained to drive on the right side of the road in the United States, to drive on the left side of the road. Do we need to repeat the entire training process, this time with videos of driving on the left, and actual time spent on roads driving on the left? Or can the process be a simpler one?

At present, I would think the answer is probably closer to the former. But I hope someone can look into this to see how we can find an answer to perform the latter. Because the latter is closer to human intelligence. I learnt driving, and obtain my driving licence driving on the left side of the road. But when I had to drive in the United States, I did not retake my driving lessons to learn how to drive on the right side of the road. I just drove a bit more cautiously for the first hour or so to get used to driving on the right. Will we be able to achieve this in a machine?