[morphomeman]

On German autobahns, the left lane is for passing. If a large truck is driving at 80 k/h in the right lane and the driver of the vehicle behind wants to pass at 90 k/h, they are entitled to do so as long as the left lane is clear.
This means that a driver going at 200 k/h in the left lane has to be vigilant of the 90 k/h passing vehicle and may have to slow down abruptly.
All German drivers know how this works.
In Italy, at least in the old days, there was an unwritten rule that a Ferrari driver could go as fast as they wanted to, regardless of the posted speed on the autostrada. This made for some interesting moments, such as when one Fiat 600 was passing another at very slow speed and a Ferrari was coming up fast behind. Again, the onus was always on the Ferrari to slow down, sometimes very precipitously.