I had a lot of driver pass me quite aggressively (while I was going at speed limit or maybe 1-2 kph less) only to stop at red lights in 300 meters or park near a grocery store in 400 meters. I cannot understand their thinking, if this kind of road rage can have any thinking behind it at all. Those milliseconds saved likely mean a lot to them.
The winter is coming, and at least here in Europe all signs are that energy — be it gasoline or diesel or electricity — are going to be quite expensive. For any kind of vehicle out there, the only practical way to save fuel is to drive smoothly, in a relaxed way, without sudden acceleration/deceleration, and not at all at highway speeds.
As far as I know, no type of commercially sold vehicle has its optimum speed for maximising range close to highway speeds. Maybe it’s not true about some sport vehicles produced in dozen units total.
Could as well just relax and save money, too.
Of course, that is completely futile and I was just being a jerk. Life is much better if you regard the other drivers as your fellow humans, and remember that we're all in this together. Being default-courteous has helped me be much more relaxed and happy.