Realistically for most commutes this equates to a couple of minutes extra driving. Most delays are at lights/intersections not low speed limits.

Which makes the Amerikkkan mentality of “lowering the speed limit is Stalin 1984 vuvuzela!” but also “replacing traffic lights/intersections with roundabouts is gommunism” extra ridiculous.

Where I live the city streets speed limit is a relatively low 25 mph/40 kmh. Even then, I don’t like going faster than 20 mph, right around that 30 kmh mark. I tell you, it’s not just some arbitrary number, you really feel safer, more control, better perception, and significantly less braking distance when driving that speed. Yet, I still get honked at semi-regularly by people pissed off that I’m not going fast enough for their liking (often accompanied by them then making a illegal driving maneuver to speed around past me). And it’s not like 20 mph is drastically slower from a “getting to point a to point b” perspective than 25 mph.

So it’s not just a resistance to a regulatory lowering of the speed limit, they are hostile to other drivers that are interfering with their desire to speed on local roads.