Connecting Traffic, Air Quality, and Coronavirus Spread

Early in the pandemic, bike sales soared and vehicle miles traveled plummeted. As people have been driving more, more people have also been infected with the novel coronavirus.

1 minute read

July 31, 2020, 7:00 AM PDT

By James Brasuell @CasualBrasuell


Houston Texas

Trong Nguyen / Shutterstock

Andy Olin provides a really thorough overview of the mobility trends in the United States since the outset of the COVID-19 pandemic in March. 

The narrative is summarized thusly: 

Traffic levels fell dramatically throughout the Houston metro area as people were ordered to stay at home and businesses were closed to mitigate the spread of COVID-19 — and it worked. But, as the economy was reopened and people returned to work, restaurants, bars, beaches and more, traffic levels and infection rates increased.

The article includes a mountain of data on bike sales and use, traffic and vehicle miles traveled, and air quality, providing specific examples from around the country and the nation as a whole, before drilling down on air quality data in the Houston area. Much of the information in the article has been reported before in separate media outlets and news coverage, but here we have all the relevant data in one place, clearly put in context and analyzed for potential implications. 

But the article also includes a bombshell revelation that could potentially upend the ongoing narrative about density and transit being the most conductive modes for transmission of the coronavirus: when people drive more, more people are infected with the coronavirus.

Monday, July 27, 2020 in Rice Kinder Institute for Urban Research

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

Concrete Brutalism building with slanted walls and light visible through an atrium.

What ‘The Brutalist’ Teaches Us About Modern Cities

How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

February 28, 2025 - Justin Hollander

Complete Street

‘Complete Streets’ Webpage Deleted in Federal Purge

Basic resources and information on building bike lanes and sidewalks, formerly housed on the government’s Complete Streets website, are now gone.

February 27, 2025 - Streetsblog USA

Green electric Volkswagen van against a beach backdrop.

The VW Bus is Back — Now as an Electric Minivan

Volkswagen’s ID. Buzz reimagines its iconic Bus as a fully electric minivan, blending retro design with modern technology, a 231-mile range, and practical versatility to offer a stylish yet functional EV for the future.

March 3, 2025 - ABC 7 Eyewitness News

View of mountains with large shrubs in foreground in Altadena, California.

Healing Through Parks: Altadena’s Path to Recovery After the Eaton Fire

In the wake of the Eaton Fire, Altadena is uniting to restore Loma Alta Park, creating a renewed space for recreation, community gathering, and resilience.

March 9 - Pasadena NOw

Aerial view of single-family homes with swimming pools in San Diego, California.

San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

March 9 - Axios

Close-up of row of electric cars plugged into chargers at outdoor station.

Electric Vehicles for All? Study Finds Disparities in Access and Incentives

A new UCLA study finds that while California has made progress in electric vehicle adoption, disadvantaged communities remain underserved in EV incentives, ownership, and charging access, requiring targeted policy changes to advance equity.

March 9 - UCLA Luskin Center for Innovation