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.

San Jose Affordable Housing Development Gains Approval
A proposed project is moving forward with reduced building heights and all-affordable units.

Oklahoma City Begins Work on Parking-Protected Bike Lane
The project is part of the city’s broader plan to improve bike and pedestrian infrastructure and road safety.

How Cities Can Avoid Perpetuating Segregation
Residents of big cities, known as the ‘melting pots’ of America, have fewer interactions with people outside their socioeconomic group than those in smaller communities, according to new research.

US Building Emissions are Growing
Green building standards and efficiency retrofits are not keeping up with energy demand, resulting in a net increase in greenhouse gas emissions from buildings.

Op-Ed: Why NYC Needs a Comprehensive Plan
The city’s congestion pricing program could change transportation and land use in radical ways. A comprehensive plan would make the most of those changes.