That part also exists in Germany. The 100kph on the "Landstrasse" - which does not mean two lane highway, it could simply be the road connecting two small towns that doesn't look much different from the road in town except for no houses on either side - only applies to cars. Trucks have an automatic limit of 80kph. That is sooo dumb! Lots and lots of accidents because cars get stuck behind trucks and get aggravated. Especially on one lane ones that have enough traffic to make passing almost impossible. And since this is Germany, most of these aren't straight like you might expect from the US. These are usually very meandering, which makes it real hard to pass those trucks.

And never mind the actual highways, where there's no speed limit unless posted. And trucks still can only go 80kph. So you have 2 lane Autobahn. Trucks at 80-99kph on the right lane. 90-200kph cars on the left lane. The trucks that go 80 will have a bunch of trucks that want to go 90 trying to pass them. Then add the ups and downs where even the 90kph truck that's passing will slow to 75. Even if you're only cruising at 150kph (actually a pretty nice cruising speed), if you come up on an "elephant race" as they call it behind a bend in the road it's not fun. This extends to 3 lane highways too. Just that now you actually have cars switching from the middle lane to the left lane, because one truck is passing another. So you have an 80kph truck on the right, 90kph truck on the middle lane and a 100kph car in the left lane and the 200kph Mercedes or BMW approaching from the rear.