> Normal speed is closer to 110. Average, you might be right. Many people definitely drive a lot faster (I guess that's where the sibling comments "do you driv

> Normal speed is closer to 110. Average, you might be right. Many people definitely drive a lot faster (I guess that's where the sibling comments "do you drive in germany" come from), but then they get stuck behind an overtaking truck etc., and then there are people driving slower so the average speed across all lanes might very well be 110 at busy times (and of course you're most likely to drive when it's busy, so that's what you'd observe). The problem (emissions) might be from accelerating up to 150, then back down because someone driving 120 is overtaking someone else, the person behind you also has to brake, and repeat.