ULEZ

Close-up of green ULEZ sign in London, UK.

Study: London ULEZ Rapidly Cleaning up Air Pollution

Expanding the city’s ultra low-emission zone has resulted in dramatic drops in particle emissions in inner and outer London.

March 10, 2025 - Smart Cities World

Person stands next to pile of burning debris in street holding French flag during Yellow Vest protests

Watch Out for Green Class Backlash

Low emission zones, like that implemented in London, face backlash from critics on all sides of the political spectrum for impacting the poorest drivers and putting a burden on small businesses.

August 1, 2023 - Joan Fitzgerald

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.