Childhood asthma cases caused by traffic pollution are on the decline. But children in some parts of the country are faring better than others.
Drivers of polluting vehicles will face a daily charge, but evidence suggests it's a price worth paying.
Starting in 2021, drivers will pay a fee to enter midtown and lower Manhattan during busy times of day. Will this clear New York's air and streets?
There are more than 300 contingency plans across government departments.
Much of the growth in our cities is in the outer suburbs, now home to around 5 million people. And that creates problems like traffic that detract from the advantages residents see in living there.
US cities were designed and engineered around cars. Now some are working to increase walking and biking, but the shift isn't easy.
Minorities are driving the bicycling boom, but bike infrastructure investments often neglect their needs. A new study explores what riders in low-income and minority neighborhoods want.
Operation Brock's underwhelming test run goes to show how ill-prepared the UK is for a no-deal or hard Brexit scenario.
Car-free days could work in Nairobi where traffic, congestion and air pollution is a real problem.
Rising e-commerce means more delivery trucks and urban gridlock. Lockers at transit centers, where carriers can leave packages for people who live or work nearby, are a potential solution.
Officers with college degrees were significantly more likely to pull over drivers for less serious violations, search drivers or their vehicles and make arrests on discretionary grounds.
The debate over the place of cars in cities may seem recent, but pamphlets published during the French Revolution show that the battle was raging before the first automobile even saw the light of day.
As traffic slows down, research is gathering momentum.
Young people raised their voices in the streets and online – but a government crackdown seeks to silence them.
It can feel much faster to get the bus – but that could all be a matter of perspective.
Popular as gondolas in ski-fields around the world, cable cars, aerial trams, wires or ropeways are increasingly used for mass transit in progressive cities. Is this the future for Australian cities?
Busting congestion requires some creativity - and evidence-based methods. Here are four of these.
Hundreds of US cities have red light cameras to try to catch traffic violations and prevent accidents. But research shows that the cameras may encourage other types of accidents.
We see the daily commute as a waste of time. But there's another way to see the experience: a whole life in the events and memories we form during these journeys, which change us as human beings.
In many US cities, ride-hailing apps are luring riders away from public transit and increasing traffic congestion. But with the right rules, they could enhance public transit instead.