What If We Supplied Hamburgers the Same Way We Supply Roads?
The concept of "induced demand" for road space essentially means that new, or widened, highways will entice more drivers onto the roads, negating any congestion-reducing benefits of the new road.
But induced demand doesn't just apply to roads. Broadly speaking, it's an economic concept that goes something like this: If something is free, or low cost, people will consume more of it.
Here's an analogy, courtesy of a commenter at Greater Greater Washington, that gets to the heart of the matter:
Let's give everyone free McDonald's hamburgers. Let's put 10,000 hamburgers a day on a table in front of the Capitol (or wherever).
What would happen? People would take and eat the hamburgers, and once word got out, all 10,000 hamburgers would be taken very quickly every day. We may thus infer that because people need food and they really seemed to like those burgers, McDonald's hamburgers are an important public good.
A city planner might notice a problem: those 10,000 hamburgers just aren't enough. They get taken very early in the morning, so not everybody has a chance to get a hamburger. The obvious solution—because burgers are a highly-valued public good—is to provide more free burgers. So the city planner starts to provide 20,000 hamburgers a day.
You can see where this is going. People start going out of their way to get the free hamburgers, and planning their day around that trip. The city has to keep providing more and more free burgers—eventually millions a day—to keep satisfying the demand for free hamburgers.
Elsewhere on the Network today: Kaid Benfield at the Natural Resources Defense Council's Switchboard blog says advocates for sustainable cities should be careful not to parrot buzzwords like "vibrant" so often they become meaningless. Walkable Dallas Fort Worth attempts to quantify the economic value that bustling sidewalks bring to a city. And Strong Towns wonders whether we're seeing a fundamental shift in the way people view and value car parking facilities.
Stay in touch
Sign up for our free newsletter
More from Streetsblog USA
Are Friday’s Headlines the New Normal?
Transit ridership hasn't come all the way back from the pandemic, and they're going to need more federal help, along with other changes, says Governing magazine.
Friday Video: How to Make Places Safe For Non-Drivers After Dark
A top Paris pedestrian planner, a leading GIS professional, and Streetsblog's own Kea Wilson weigh in on the roots of America's nighttime road safety crisis, and the strategies that can help end it.
OPINION: Congestion Pricing Will Help My Family Get Around As We Navigate Cancer Treatment
My partner was recently diagnosed with cancer. Congestion pricing will make getting her to treatment faster and easier.
Talking Headways Podcast: Money is a Lot of Different Things
It's Part II of our discussion with Jim Kumon!
If Thursday’s Headlines Build It, They Will Come
Why can the U.S. quickly rebuild a bridge for cars, but not do the same for transit? It comes down to political will and a reliance on consultants.
