Could be related to Braess's paradox? In this case "adding lanes" would be "increased routing" > [The] idea was that if each driver is making the optimal self-

Could be related to Braess's paradox? In this case "adding lanes" would be "increased routing" > [The] idea was that if each driver is making the optimal self-interested decision as to which route is quickest, a shortcut could be chosen too often for drivers to have the shortest travel times possible. https://en.wikipedia.org/wiki/Braess%27s_paradox https://en.wikipedia.org/wiki/Braess%27s_paradox Personally I'd rather not go through neighborhoods for just a tiny micro-optimization because of how much more "work/attention" is required given the increased pedestrian traffic.