Ranking the Climate Impact of Transportation in the 100 Largest U.S. Metro Areas

This performance ranking separates the fakers from the legit operation to reduce carbon emissions from transportation.

1 minute read

January 21, 2020, 6:00 AM PST

By James Brasuell @CasualBrasuell


Manhattan, New York City, New York

dibrova / Shutterstock

Streetlight Data released its "2020 U.S. Transportation Climate Impact Index," which ranks the 100 largest metropolitan areas on climate impact using performance-based transportation metrics.

As explained in an article that introduces the index, the rankings boil down to the difference between car travel and low-carbon alternative modes of travel. Thus, the number one metropolitan area probably won't come as a surprise: New York City-Newark-Jersey City. Coming in second is San Francisco-Oakland-Hayward, and coming in third is Madison, Wisconsin.

Streetlight Data released a package of data and articles to help offer insight into the details of the index beyond the rankings. So the entire list of metropolitan areas and rankings by key metrics in the index are also available.

The decline of the coal industry in recent years has pushed transportation to the top of the list as the largest emitter of greenhouse gas by sector. Streetlight Data puts a finer point on the origins of that leading source of greenhouse gases.

Friday, January 17, 2020 in Streetlight Data

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Get top-rated, practical training

Close-up of "Apartment for rent" sign in red text on black background in front of blurred building

Trump Administration Could Effectively End Housing Voucher Program

Federal officials are eyeing major cuts to the Section 8 program that helps millions of low-income households pay rent.

April 21, 2025 - Housing Wire

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

April 30, 2025 - Diana Ionescu

Ken Jennings stands in front of Snohomish County Community Transit bus.

Ken Jennings Launches Transit Web Series

The Jeopardy champ wants you to ride public transit.

April 20, 2025 - Streetsblog USA

Close-up of white panel at top of school bus with "100% electric" black text.

Driving Equity and Clean Air: California Invests in Greener School Transportation

California has awarded $500 million to fund 1,000 zero-emission school buses and chargers for educational agencies as part of its effort to reduce pollution, improve student health, and accelerate the transition to clean transportation.

April 30 - California Air Resources Board

Aerial view of Freeway Park cap park over I-5 interstate freeway in Seattle, Washington at night.

Congress Moves to End Reconnecting Communities and Related Grants

The House Transportation and Infrastructure Committee moved to rescind funding for the Neighborhood Equity and Access program, which funds highway removals, freeway caps, transit projects, pedestrian infrastructure, and more.

April 30 - Streetsblog USA

"No Thru Traffic - Open Streets Restaurants" sign in New York City during Covid-19 pandemic.

From Throughway to Public Space: Taking Back the American Street

How the Covid-19 pandemic taught us new ways to reclaim city streets from cars.

April 30 - Next City