Supply and Demand

The Irony of Ring Roads

One way to address traffic congestion is to provide a bypass for vehicles around city traffic machinations. Ring roads, by definition, are meant to perform that function. In reality, they ignore the supply and demand model of traffic management.

November 7, 2013 - Steven Snell

The Economics of China's Mega Traffic Jam

The recent 11-day traffic jam in China was no fluke. As The Economist explains, the crushing congestion is little more than a real-world example of imbalances in supply and demand.

August 30, 2010 - The Economist

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.

Top Books

An annual review of books related to planning.

Top Schools

The definitive ranking of graduate planning programs.

100 Most Influential Urbanists

The who's who of urbanism, according to Planetizen readers.

Urban Planning Creators You Should Know

A short list of voices on social, video, and podcasting platforms.