More and more we're learning that protected bike lanes with physical separation from car traffic are the best at changing behavior and getting a lot more people to cycle. But they can be time consuming to construct. We interview Bike Program Coordinator Kyle Kozar, Mobility Manager Jason Kligier, and Principal Civil Engineer Selim Eren, from the City of Santa Monica, about their efforts creating bike infrastructure, and an innovative use of a construction machine to, effectively, 3D print protected bike lanes.