Induced Demand & Roadway Widening: Everything You Always Wanted to Know (and Weren't Afraid to Ask)

Ray Delahanty | CityNerd · 120K views · 2022 · 14:54

Open on YouTube

Transit, cities & urban planningMicroeconomics & behavioral economicsexplainer

Why Hacker News recommends it

HN commenters link it as a clearer explanation of induced demand for people who have not studied the topic.

What it is

CityNerd Ray Delahanty explains induced demand and what happens when freeways are widened. He walks through the economics of supply and demand applied to traffic and asks how much new traffic appears and whether congestion returns.

Recommended by 3 HN commenters across 3 different months, 2022 to 2024.

What Hacker News said

Recommends noahmasur · 2022-06 · on “Why America can’t build”

The problem is that "inducing demand" for people who would otherwise take public transit doesn't actually increase efficiency. Putting more cars on the road is not necessarily a net benefit. See this video from CityNerd for more details: [this video]

Recommends tidbits · 2024-06 · on “In Colorado, an ambitious new highway policy is not building them”

Books are not a finite resource? Obviously there is a finite number of trees but there are enough for it not to be a bottleneck. Land on the hand is a finite resource, especially in large, urban cities. There is no way to design a highway or other car infrastructure that will meet the demands of any reasonably sized city without dedicating an unreasonable amount of land to cars. Anyway, Ray explains it better than I could and he agrees that the term is bad: [this video]

Recommends oblio · 2024-07 · on “I mapped almost every USA traffic death in the 21st century”

Have you read anything or watched anything about induced demand or did you just read the expression and figured it all out by yourself? [this video]