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.
!["I [heart] Philadelphia" sign in front of fountain with city hall building in background](/files/styles/small_400/public/images/AdobeStock_514479381_Editorial_Use_Only.jpeg.webp?itok=DHSJSfSZ)
Philadelphia’s City Center Rates Highly for Transit, Walkability
While not all parts of the city are equally accessible, its central district boasts one of the nation’s densest transit networks and high ridership rates.

Geothermal Pilot Program Breaks Ground in Massachusetts
A first-of-its-kind’ program will connect roughly 40 residential and commercial buildings to an underground geothermal network that will replace fossil fuel-powered furnaces.

How Car-Oriented Infrastructure Harms Public Health
A new documentary shows the ways that infrastructure designed for cars and not people is making us ill.

California Commission Recommends Infrastructure Improvements
The state’s Transportation Commission outlined three major programs that should receive gas tax funding.

What Caused the Failure of Zoning Reform in Colorado?
Land use reform bills that gained bipartisan support in the Montana legislature were strongly opposed by Colorado Republicans.