The ambulance emergency is just one example, there are many more that you aren't considering. As one more example there are many passing situations, such as pretty much any two lane highway, where it's perfectly acceptable to break the speed limit for a brief period. I can think of other exceptions too and this is just after thinking about it for a minute, there are probably thousands of real world situations neither of us could think of ahead of time.
Plus, this is all assuming such a system could be implementing flawlessly. In practice, such a complicated and messy system would have a million bugs. Who keeps the speed limit database of every single road in country up to date? How are all of the precise boundaries of every single speed limit zone going to be defined and recognized by every vehicle?
> As one more example there are many passing situations, such as pretty much any two lane highway, where it's perfectly acceptable to break the speed limit for a brief period.
That's not true legally speaking and I'm pretty sure it's not true from a driving standpoint. Why would it be acceptable to break the speed limit to overtake somebody? If you need to speed to be faster than somebody you shouldn't be passing them. If they speed up during the passing manoeuver you should probably slow down and fall back.
It's a pretty frequent problem for someone to be going 10mph below a 55mph limit. To pass safely you have to go well above the limit for a few seconds, even if they don't speed up, so that you aren't in the oncoming lane for too long.
If they speed up during the passing manoeuver you should probably slow down and fall back.
If there's oncoming traffic, sure, but not as a matter of principle. Once you start passing, you should definitely finish unless it becomes dangerous to do so.
If you are passing someone on a two-lane highway using the opposite lane, you need to do it as quickly as possible and then return to your lane.
Also, even if the traffic you're passing is at the speed limit, there are perfectly legitimate reason to pass them. For example, you may want to keep some distance from a heavy truck.
No, of course you can not break the speed limit to pass, why would you think that? If you need to speed to pass, why would you pass in the first place?
The reality of it is, as someone who has driven thousands of kilometres on unrestricted autobahns, speed is just a trick your ape brain is playing on you. It feels fast, but going 30 mph faster than everyone else just drains your tank excessively while the GPS is not fooled and ticks down the arrival time only by a few minutes by the end of it.
Plus, this is all assuming such a system could be implementing flawlessly. In practice, such a complicated and messy system would have a million bugs. Who keeps the speed limit database of every single road in country up to date? How are all of the precise boundaries of every single speed limit zone going to be defined and recognized by every vehicle?