See also https://en.wikipedia.org/wiki/Braess's_paradox https://en.wikipedia.org/wiki/Braess's_paradox > adding one or more roads to a road network can slow do

See also https://en.wikipedia.org/wiki/Braess's_paradox https://en.wikipedia.org/wiki/Braess's_paradox > adding one or more roads to a road network can slow down overall traffic flow through it.