New York City greenlights congestion pricing – here’s how this toll plan is expected to improve traffic, air quality and public transit

One more reason not to drive into midtown Manhattan: Soon it will cost an extra $15 as New York City launches its long-debated congestion pricing system.

John Rennie Short, Professor Emeritus of Public Policy, University of Maryland, Baltimore County • conversation
April 10, 2024 ~9 min

Digitized records from wildlife centers show the most common ways that humans harm wild animals

Hundreds of wildlife rehabilitation centers across the US and Canada treat sick and injured animals and birds. Digitizing their records is yielding valuable data on human-wildlife encounters.

Richard B. Primack, Professor of Biology, Boston University • conversation
Nov. 22, 2023 ~8 min


What are roundabouts? A transportation engineer explains the safety benefits of these circular intersections

Whether you call them rotaries, traffic circles or roundabouts, they offer a safer alternative to the four-way stop. But the modern roundabout has been decades in the making.

Deogratias Eustace, Professor of Civil, Environmental and Engineering Mechanics, University of Dayton • conversation
Oct. 25, 2023 ~7 min

Ever-larger cars and trucks are causing a safety crisis on US streets – here's how communities can fight back

Cars are getting bigger on US roads, and that’s increasing pedestrian and cyclist deaths. A transport scholar identifies community-level strategies for making streets safer.

Kevin J. Krizek, Professor of Environmental Design, University of Colorado Boulder • conversation
Aug. 2, 2023 ~9 min

To reclaim downtowns from traffic, require developers to offer strategies for cutting car use

US cities are starting to reform laws that required developers to provide minimum amounts of parking. But there’s more they can do to loosen the auto’s grip on downtowns.

Chris McCahill, Managing Director, State Smart Transportation Initiative, University of Wisconsin-Madison • conversation
July 26, 2023 ~9 min

Bridge collapses, road repairs, evacuations: How transportation agencies plan for large-scale traffic disruptions

When a major roadway or bridge needs fixing, all that traffic has to go somewhere.

Lee D. Han, Professor of Civil and Environmental Engineering, University of Tennessee • conversation
June 29, 2023 ~9 min

Are low-traffic neighbourhoods greenwashing? Here's what the evidence says

LTNs were introduced to UK cities to create a more pleasant environment for pedestrians and cyclists - but they’ve become controversial.

Harrie Larrington-Spencer, Research Fellow in the Active Travel Academy, University of Westminster • conversation
June 23, 2023 ~7 min

Still recovering from COVID-19, US public transit tries to get back on track

Public buses, subways and trains are relatively safe, fast and cheap. But competition from rideshares and concerns over COVID-19 will soon see some local agencies short of funds.

Kari Edison Watkins, Associate Professor of Civil and Environmental Engineering, University of California, Davis • conversation
Nov. 29, 2022 ~6 min


How many Amazon packages get delivered each year?

The rise of e-commerce means billions of packages are delivered in the US each year. That creates traffic and pollution, but urban freight researchers are finding better way to get goods to customers.

Rishi Verma, PhD Student in Industrial Engineering and Research Assistant, Urban Freight Lab, University of Washington • conversation
Oct. 17, 2022 ~7 min

If all the vehicles in the world were to convert to electric, would it be quieter?

Noise pollution is a serious problem, and cars make a lot of it. But roads are also a factor.

Erica D. Walker, Assistant Professor of Epidemiology, Brown University • conversation
Aug. 1, 2022 ~6 min

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