> commute times increase by 30 percent Insert a huge citation needed banner... - most commutes aren't hundreds of kilometers, so a large share of your time is

> commute times increase by 30 percent Insert a huge citation needed banner... - most commutes aren't hundreds of kilometers, so a large share of your time is usually not spent on a highway - you usually can't drive the maximum speed on the highway the whole time regardless - you definitely can't drive the maximum speed on the highway the whole time during rush hour (which frankly covers most of the day if you look at traffic level plots) - maybe try planning a couple commutes (yours, your friend's, heck even take that insanely long commute of this friend of a friend) in googly maps with traffic enabled and set to rush hour and with the two speed limits. (Don't actually know if gmaps can do speed limits, but maps.openrouteservice.org can and already tells you it's not a 30% difference.) - even if it would be 30% on top of a regular, say, 20 minute commute, that's 6 extra minutes. You're hardly going to notice the difference but your emissions go from iirc ~7 l/100km to ~4.5 (source: my girlfriend's car, looking at the fuel use indicator, but it's hard to say accurately because gradients and wind and stuff throw it off and I don't have perfect recall). It will save you a bunch of cash, if you need a selfish reason to do this for.