Induced Demand

Racing Cars

Partisan Splits for Transportation Politics

Researchers found that while left-leaning respondents were more likely to favor transportation reform and sustainable modes, conservatives are not as far behind as we think.

October 11, 2021 - Streetsblog USA

Atlanta Traffic

Why Don't State DOTs Believe in Induced Demand?

Despite evidence that widening roadways is only a temporary solution to congestion, a decades-long inertia leads states to continue pushing expansion projects against local opposition.

October 6, 2021 - Bloomberg CityLab

Aerial Texas Hill Country at sunset, with an aerial view of a highway interchange and Interstate 35 in Austin, Texas.

Austin Interstate Expansion Plan Draws Opposition

A proposal to widen I-35 has drawn criticism from community members who want to see the city shift away from car-centric development.

September 15, 2021 - Texas Signal

Road Construction

Proposed Colorado Rule Calls for Mitigating Climate Effects of Road Projects

State and local agencies would be tasked with evaluating and offsetting the carbon emissions caused by new transportation projects.

August 20, 2021 - Colorado Public Radio

Los Angeles Road

Road Design Still Privileges Cars

Author Jeff Speck discusses the progress made since he first wrote Walkable City–and how far we still have to go to build streets that are safe for all.

August 9, 2021 - Governing

Car Culture

If You Build It, Cars Will Come: the Common-Sense Logic of 'Induced Demand'

Highway expansion has been shown, time and again, to increase traffic and congestion. Cities are finally getting the message.

May 14, 2021 - Governing

Houston Freeway

Watch: How Induced Demand Explains the Vicious Cycle of Congestion

A new Vox video tackles the controversial and counterintuitive concept of induced demand.

February 24, 2021 - Vox

Disabled Parking

Parking Induces Driving, Study Says

New research published in the Urban Studies journal does the difficult work of connecting the dots between parking and driving.

January 31, 2021 - Sightline Institute

Self-Driving Cars

Ride-Hailing Industry Induces Car Ownership, Research Says

New research from researchers at Carnegie Mellon University finds that instead of setting people free from cars, more people are buying and using cars than ever before.

January 11, 2021 - Streetsblog USA

Bay Bridge Toll Traffic

Failing to Account for Induced Traffic, Even When the Public Demands It

Induced traffic occurs when new highway capacity speeds up traffic, allowing travelers to drive further, increasing sprawl. A review of major highway project plans finds that most fail to accurately account for induced travel effects.

July 5, 2020 - Transportation Research Record: The Journal of the Transportation Research Board

Top Books

An annual review of books related to planning.

Top Websites

The best of the Internet—since 2002.

Top Apps

Planning apps for a brave new world.

Top Schools

The definitive ranking of graduate planning programs.

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Hand Drawing Master Plans

This course aims to provide an introduction into Urban Design Sketching focused on how to hand draw master plans using a mix of colored markers.