Source?
Here
https://www.statista.com/chart/25098/fatality-rate-and-speed-limit-on-european-motorways/ and their link to an article in Der Spiegel
https://www.spiegel.de/auto/aktuell/tempolimit-koennte-jaehrlich-bis-zu-140-todesfaelle-verhindern-a-1254504.htmlI'm not one of those who has an unthinking "speed kills" position, and the Statista table shows that there really is no link like like that - all sorts of other factors are involved. Which is why the German experience is interesting, as it removes all the factors like vehicle condition, driver training/skills, roadway quality etc. Even though there are fewer accidents on the unrestricted sections, because only the safest stretches are unrestricted, the casualty rates are higher.
Does that mean we shouldn't have a higher limit on our motorways? Not necessarily. I'm not ideologically opposed to it, and I've long thought that if we are going to vary speed limits for traffic management purposes there'd probably be better buy-in from drivers for lower limits when necessary if they also saw the same electronic signs showing higher limits when possible.
Should that higher limit top out at 100? Possibly. 80? Why not - it's common enough in other countries. 120? Possibly. Unlimited? Hmmm. Driver skills start to become a problem,
(a) for the fast driver, although different training and testing could perhaps be introduced. Could even be a money-spinner - I can envisage that someone able to afford a super/hypercar would happily pay a couple of K (to the police?) for advanced training and the right to have a numberplate showing the speed he's rated for.
But there's the (b) of all the dozy half-wits out there who don't pay attention, and the consequences of one of them pulling in front of someone doing 150 vs 70 are a lot more gripping.
None of the issues I brought up in my earlier replies were meant to be "no we shouldn't cos...", but they are things which should be considered when balancing competing interests. Is there actually any practical point to a 100 limit (other than a psychological sense of fair play)? We already tolerate a certain casualty rate, knowing it could be lowered if we lower speed limits, which is happening in urban areas, but we would need to decide to risk higher rates if we raise the limit. And of course it's not just the occupants of a fast car who face a higher risk, it's also anybody they hit.
The extra fuel consumption isn't just a matter for the driver's wallet - it means extra emissions. And my, what an EV carrot that could be - EVs allowed to go at 120, or 150, petrol/diesel kept at 70.
Things are often never as simple as at first they may appear, but the implications of a higher speed limit could be properly examined, and made a subject of public debate, if there was political will.
In other words it aint gonna happen.