Why do we use gasoline for small vehicles and diesel fuel for big vehicles?

Both gasoline and diesel fuel are refined from crude oil, but they are good for different things and can’t be used interchangeably.

Michael Leamy, Woodruff Endowed Professor of Mechanical Engineering, Georgia Institute of Technology • conversation
Oct. 28, 2024 ~6 min

Los Angeles is in a 4-year sprint to deliver a car-free 2028 Olympics

Can a city that’s synonymous with freeways and gridlock deliver a car-free Olympic Games? Los Angeles has picked up the torch.

Jay L. Zagorsky, Associate Professor of Markets, Public Policy and Law, Boston University • conversation
Aug. 21, 2024 ~8 min


A packed Baltimore trolley illustrates the ups and downs of US public transit

When US cities offered low-cost, high-quality public transit during World War II, buses and trains were full. Some cities are trying to revive that formula, after decades of disinvestment.

Nicholas Dagen Bloom, Professor of Urban Policy and Planning, Hunter College • conversation
Aug. 9, 2024 ~4 min

Self-driving buses that go wherever you want? How the UK is trying to revolutionise public transport

Amid bus route cuts and rail strikes, can the answer to our future public transport needs be found in the hi-tech prototypes being trialled around the UK?

Miguel Valdez, Lecturer in Technology and Innovation Management, The Open University • conversation
Sept. 29, 2023 ~28 min

Why the humble city bus is the key to improving US public transit

High-quality bus service is the fastest route to rapid, comprehensive public transit in the United States. This country was once a leader in bus transit, and with adequate funding, it could be again.

Nicholas Dagen Bloom, Professor of Urban Policy and Planning, Hunter College • conversation
March 2, 2023 ~9 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

Electric school buses are taking students back to school – bringing cleaner air and lower maintenance costs to school districts across the country

They look like conventional school buses, but electric versions are cleaner, quieter and cheaper to maintain. States, utilities and federal agencies are helping school districts make the switch.

Andrea Marpillero-Colomina, Adjunct Lecturer in Urban Studies, The New School • conversation
Aug. 17, 2022 ~9 min

Cycle lanes blamed for urban congestion – here's the reality

London was rated 2021’s most congested city.

David Metz, Honorary Professor of Transport Studies, UCL • conversation
Dec. 9, 2021 ~6 min


Removing urban highways can improve neighborhoods blighted by decades of racist policies

Two urban policy experts explain why taking down highways that have isolated low-income and minority neighborhoods for decades is an important part of the pending infrastructure bill.

Julian Agyeman, Professor of Urban and Environmental Policy and Planning, Tufts University • conversation
Sept. 7, 2021 ~9 min

Britain's betting on buses – but how far will boosting services reduce carbon emissions?

Long-overdue changes are afoot in Britain's bus networks.

Peter White, Emeritus Professor of Public Transport Systems, University of Westminster • conversation
April 1, 2021 ~6 min

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