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.

How California Kept the Lights On
To stave off rolling blackouts during a record heat wave, California relied on dramatic conservation by households and a growing renewable energy sector.

Mountain Shuttle Could Be Revived, a Century Later
Close to one hundred years after the last funicular trains took tourists up to dizzying heights in the Angeles National Forest, a new shuttle service could bring the wilderness closer to more Los Angeles residents.

A New Urban Growth Boundary for Metro Denver
Douglas County’s master plan indicates that areas south of current development will likely remain preserved through conservation initiatives, but the metro area’s booming population indicates that growth will continue to happen, somewhere.

Opinion: Traffic Calming Shouldn’t Be Optional
Road infrastructure that fails to make dangerous driving behavior feel risky to drivers is ineffective in protecting pedestrians and people on bikes.

When Transit-Oriented Development Is Missing the ‘Transit’
Cities, residents, and developers have a renewed interest in building more housing near transit stations—when they actually provide safe, reliable transit.