Why Traffic Congestion Grows Exponentially and What to Do

HN commenters cite it when arguing that congestion is an exponential, feedback-driven problem so widening roads or removing a few cars behaves counterintuitively.

CityNerd explains why traffic congestion grows nonlinearly as more cars use a road network, and why adding road capacity tends not to fix it. It covers the consequences for drivers, bus riders, cyclists and pedestrians, and discusses alternatives such as true bus rapid transit.