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

Cover CM Credits, Earn Certificates, Push Your Career Forward

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

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.

July 9, 2025 - Diana Ionescu

Map of Haussmann's redesign of Paris in the 1850s through 1870s under Napoleon III.

In Urban Planning, AI Prompting Could be the New Design Thinking

Creativity has long been key to great urban design. What if we see AI as our new creative partner?

June 30, 2025 - Tom Sanchez

Green vintage Chicago streetcar from the 1940s parked at the Illinois Railroad Museum in 1988.

Chicago’s Ghost Rails

Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

30 minutes ago - WTTV

Red and black pavilion with visitor information in public park in Knoxville, Tennessee.

Baker Creek Pavilion: Blending Nature and Architecture in Knoxville

Knoxville’s urban wilderness planning initiative unveils the "Baker Creek Pavilion" to increase the city's access to green spaces.

2 hours ago - Dezeen

Adult holding hands of two children, all wearing winter coats, in crosswalk in New York City during holidays with trees decorated with lights in background.

Pedestrian Deaths Drop, Remain Twice as High as in 2009

Fatalities declined by 4 percent in 2024, but the U.S. is still nowhere close to ‘Vision Zero.’

4 hours ago - Streetsblog USA