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.

Is China’s High-Speed Rail Boom Unsustainable?
The country is building tens of thousands of miles of rail service that is expensive to maintain and, in some cases, redundant.

NYC Launches ‘Smart Curbs’ Program
The pilot program on the Upper West Side will remove some curbside parking spots to replace them with public seating, bike racks, and delivery zones.

Tesla Is California’s Second-Biggest Air Polluter
A Wall Street Journal investigation found multiple and repeated violations of California’s air quality rules.

Atlanta City Leaders Call on MARTA to Expand Weekend Service
The city is set to host multiple major sporting events in the next several years, prompting calls for expanded transit service on weekends and to popular areas.

“Steam Loops” Can Power Large Buildings With Clean Energy
Underground steam pipe systems in New York, Boston, and other cities could hold the key to renewable power generation.