The Atlantic Cities takes a look at the Economics of Traffic Congestion. It turns out that congestion is positively correlated with per-capita GDP, and there’s little evidence to suggest that traffic congestion ends up inhibiting economic development significantly. In their words it’s nothing more than a metric of how convenient it is to drive an automobile. But many cities still insist on “Level of Service” as a metric of success in their transportation master planning process, under the assumption that congestion must necessarily be bad for the economy.