I find the graphs without much meaning. I live in Germany and we didn't have a strict lockdown where you would get a fine for doing non-essential outside activity. In April cultural and fitness were closed. Therefore the only way to do something is to go outside.
The interesting thing would be to understand how many other people you were meeting with which I would think that data does not provide. I mean Google likely has that data but didn't anonymize it in order to release it.
Meeting more people than allowed and not covering your mouth and nose is something that was spot checked and still is.
More than a million people were fined by police during the spring . So many fines, that we are still seeing news about judges taking decissions on these fines, so it clearly overloaded our justice system. Surprisingly, many of them are being rejected by judges because of not being fair.
Police officers can fine you if they believe you are infringing the law, and civils have to take their word as granted until a judge makes the final decission. People were fined in the spring for things such as driving to pick up groceries in a store different than the one closest to their homes , or because of walking the dog (one of the very few exceptions to leave the house) "too far from home", despite the law having never settled an official maximum distance .
I've already said that, but my cousin (emergency care) in Colmar was sending his "best" patients in army planes to another cousin working in Brittany (reanimation). He worked 12 to 14 hours a day, for 45 days straight. That was one hotspot, and Colmar was hit a bit less than Bergame, i'm pretty sure any italian having familly there would have many more horror story than i have. At least they didn't have to select patients in Colmar (well, not as much).
I'm not sure if the difference from the European countries is in people complying or with good implementation (clear, short rules). Either way, spread inside the city (so the island / sparse pop arguments are irrelevant) has been eliminated.
The difference in rules simplicity and exclusions is visible. Compare for example official rules for UK's level 3 only https://www.gov.uk/guidance/tier-3-very-high-alert with Victoria's 3 steps all together on this page https://www.health.gov.au/resources/publications/3-step-fram...
I'm in Sweden at the moment and I've essentially locked myself down, even though its not legally required.
In that sense, it "works". Whether it's worth the cost is another issue, but it does sound like certain hospitals were filling up rapidly.
The strongest evidence I've seen is China. It was the center of this pandemic and now the virus there is basically gone. Sure they lie about their numbers and there probably some community spread here and there but there's no way they are completely hiding a pandemic.
Google publish data for everywhere. (At least, I see Bulgaria, Croatia, Czechia... )
This is app tracking, but Google and Apple have more direct access : https://nrkbeta.no/2020/12/03/my-phone-was-spying-on-me-so-i...
Google does this kind of tracking. Apple uses a periodically changing id that is not associated with your person.
If you have an iPhone Apple probably knows where you live because you told them, but not because you use Apple Maps or GPS on their devices.