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.
Data Shows Chicago Speed Cameras Reduce Speeding, Crashes
Countering claims made by the Chicago Tribune that automated enforcement doesn’t improve safety, Streetsblog Chicago lays out the data showing how traffic safety fared in camera zones.
NYC Zoning Reform: Where Will It Have an Impact?
The zoning reform package dubbed ‘City of Yes’ will likely yield uneven results, with many of the lowest-density neighborhoods exempted from new regulations.
U.S. Miles Driven Rose by 1 Percent in 2024
Americans drove a total of 3.279 trillion miles in 2024, but per capita VMT stayed the same.
Seattle Recorded Zero Bike Deaths in 2024, per Early Data
The city halved the number of pedestrian deaths compared to 2021.
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.