I think that some changes in traffic aim to optimize the instantaneous speed, while it should aim to minimize the door-to-door time. Driving 1km@10km/h takes 6

I think that some changes in traffic aim to optimize the instantaneous speed, while it should aim to minimize the door-to-door time. Driving 1km@10km/h takes 6 minutes, while driving 5km@30km/h takes 12 minutes, and you might end up driving 5km@1km/h at rush hour because the longer distance keeps you in traffic for more time. This actually happened in my home city, some areas implemented "improvements" that made it very difficult to reach some destinations, you need to follow long detours intended to "improve flow", they might improve flow for whoever is just passing by, but traffic that originates or terminates in that area, it is hell.