Intersection Design

Rendering of Penrose Roundabout in Philadelphia, Pennsylvania.

Philadelphia Is Expanding its Network of Roundabouts

Roundabouts are widely shown to decrease traffic speed, reduce congestion, and improve efficiency.

April 27, 2025 - WHYY

Vancouver, British Columbia

Bloomberg Philanthropies Announces New Round of Asphalt Art Initiative Grants

Bloomberg Philanthropies is funding projects that take an artistic approach to traffic safety.

October 3, 2021 - Bloomberg Philanthropies

Protected Bike Lane

Nation's Top Safety Board Recommends Protected Bike Lanes

The NTSB chair issued a stark warning on Nov. 5: "If we do not improve roadway infrastructure for bicyclists, bicyclists will die who otherwise would not," stated Robert Sumwalt in introducing their first report in 47 years devoted to bike safety.

November 19, 2019 - National Transportation Safety Board

Pop Up Protected Bike Lanes

NACTO Guide Aids Bike Safety in the Intersection

Despite massive progress in building out new protected bike lanes, many communities are still coming up short with safety improvements at intersections, the location of most vehicle-bike conflicts.

May 22, 2019 - Smart Cities Dive

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.