I think software for self driving vehicles might have to be localized to prevent accidents

For example, you would need one set of instructions for cities in general, then another set of instructions for suburbs and another set of instructions for country driving, because if you tried to combine all these elements you likely are going to have accidents because driving in these types of situations is completely different.

For example, I consider driving say from where 505 enters 5 on up north as far as Redding as some of the easiest driving in California because there are no signals. However, if you are not aware of the habits of Semi-Truck drivers, fast drivers, slow drivers, drivers with loads of various kinds including trailers of all sorts and their habits it could be dangerous to you as a driver.

For me, personally the scariest place to drive in California is Los Angeles County Freeways. Because if they are not clogged drivers drive really fast, change lanes a lot and often drive very close behind you to the point if there actually was an accident 10 car or more pileups on the freeway would be common and likely are. This is just what it is like often (when there isn't traffic of everyone driving between 75 and 85 miles per hour often bumper to bumper with no distance at all really between cars.And most country drivers in the U.S. would be very intimidated by this kind of driving if they hadn't experienced it before.

So, unless you are a very good driver and very very focused it would be easy to be in an accident in Los Angeles County on any Freeway if there isn't a traffic jam at that point.

However, software might have completely different issues than a human driver and this is a part of my point.