Mike Lydon, urban planner, principal of The Street Plans Collaborative, and co-author of The Smart Growth Manual and of Tactical Urbanism: Short-Term Action for Long-term Change (Island Press, 2015), offers how-to information for low-cost projects like the Times Square pedestrian plazas that started with street paint and plastic chairs but led to more permanent change.

Here's @MikeLydon in the studio: pic.twitter.com/GD6JphGs6F

— Brian Lehrer Show (@BrianLehrer) April 15, 2015