Diana is a writer and urbanist passionate about public space, historical memory, and transportation equity. Prior to joining Planetizen, she started and managed a farmers' market and worked as a transportation planner in the bike share industry. She is Planetizen's editor as of January 2022.

Examining Philadelphia’s Zoning Overlay Districts
A decades-old policy allowing hyperlocal zoning exemptions and restrictions creates a confusing patchwork of zoning regulations across the city.

Germany Launches €49 Nationwide Transit Pass
The low-cost monthly ticket is a boon for some commuters and urban travelers, but critics of the program question the lack of investment in expanding train service to underserved rural parts of the country.

The Precarious Future of American Transit
The author of ‘The Great American Transit Disaster’ explains how U.S. transit agencies got to the existential crisis they face today.

Washington Cities Balance Housing Development and Tree Canopy
Cities like Seattle and Bellingham are working to increase housing density while also preserving urban trees and green spaces.

Chicago Bike Share Expands Citywide
Divvy is now available in all 50 wards, with more stations and bikes planned for the system in the next two years.