I have one hard-and-fast rule: every lecture, no matter what, I will talk at length about induced demand. I do this because induced demand is the great intellectual black hole in city planning, the one professional certainty that everyone thoughtful seems to acknowledge, yet almost no one is willing to act upon. It’s as if, despite all of our advances, this one (unfortunately central) aspect of how we make our cities has been entrusted to the Flat Earth Society.
