5 Freeway

Diverging diamond interchange in Springfield, Missouri.

Diverging Diamond Interchange Puts Drivers on the Left Side of the Road

The unusual design improves traffic flow and reduces the danger of head-on collisions as cars enter the I-5 freeway.

January 5, 2021 - Seattle Times

Historical I-5 Freeway

The Backbone of Orange County

In the 1950s, southern Orange County, California was a place of open hills, citrus groves, and scattered towns. The I-5 Freeway changed that, paving the way for today's subdivisions.

May 10, 2016 - KCET

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.