The Office of Sustainable Development in Portland, Oregon, has decided that one of the best ways to cut down on greenhouse-gas emissions is by fostering what it calls the “20-minute neighborhood.”

Dhiru Thadani and Matt Bell, along with the CNU-DC Chapter board, orchestrated the recent Council on “Density Without Urbanism/Urbanism Without Density.” They see the event as the beginning of a series of CNU discussions on density and urbanism. “We...

Now that parking mandates are falling at an accelerating clip, here's a look at the fountainhead of parking reform.