When roads are well designed, maintained, and drivers well educated, and within the constraints of a culture which consider the impact of one's behaviour on others, speed does not appear to be a primary contributing factor in fatalities or accidents in general. However speed is a compounding factor when accidents occur. Meaning it increases the likelihood of fatalities when accidents do occur for other reasons. Still, despite all of this, the Autobahn has a significantly lower rate of fatalities than other roads within Germany.
Most people go below 130km/h on an autobahn. German drivers are pretty good and aware.
In comparison in Poland we have way more speed related accidents on our highways even though there is a speed limit. It's because we have a lot of very bad drivers who go too fast.
It's not enough to look at the speed limit. You would need to look at actual speed.
It's actually even safer: https://www.ncesc.com/geographic-pedia/what-is-the-accident-...
When roads are well designed, maintained, and drivers well educated, and within the constraints of a culture which consider the impact of one's behaviour on others, speed does not appear to be a primary contributing factor in fatalities or accidents in general. However speed is a compounding factor when accidents occur. Meaning it increases the likelihood of fatalities when accidents do occur for other reasons. Still, despite all of this, the Autobahn has a significantly lower rate of fatalities than other roads within Germany.