alt Hacker NewsThey failed because traffic can’t be fixed by adding capacity. The inefficiency of cars will mean you can never build enough roads to keep ahead of consumption.
Traffic gets fixed by getting most people to use some other form of transport and leaving cars to the edge case uses.
Sure traffic can be fixed by adding capacity. Demand is ultimately finite. You see this in places like the midwest where there is overcapacity on the highway system and you can go a mile a minute across the region pretty much at all hours of the day.