The science of getting quickly and safely to the bottom.
In many cities, convention holds that there's a lane for walking and a lane for standing on the escalator. But human systems engineers suggest this isn't the most efficient option for the system.
Cycling advocates set up ‘ghost bikes,’ like this one in Brooklyn, in memory of bikers killed in traffic.
US cities were designed and engineered around cars. Now some are working to increase walking and biking, but the shift isn't easy.
Other people influence how we vote, what jobs we apply for, which gadgets we buy – so of course they influence how we get around the city.
Le Pont-Neuf et la Pompe de la Samaritaine, vue du quai de la Mégisserie, painting by Nicolas Raguenet (circa 1750-1760).
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.
Look both ways! Public education was the only thing policy makers did to help the rising number of pedestrians killed by cars. Staged image from Ontario Safety League 1923 safety campaign.
City of Toronto Archives
Torontonians have been experiencing pedestrian and bicyclist fatalities since the advent of the automobile. The one way to stop the deaths is to ban cars but since that won't happen, what can be done?
A man in downtown Atlanta with an electric scooter on June 26, 2018.
Brinley Hineman/ AP Photo
Electric rideables are making life less comfortable and more dangerous for pedestrians. Here's how makers of rideables could help make cities safer for everybody.
A lecturer in transport engineering weighs in on one of the greatest debates of our time.
When cars, trucks, bikes and pedestrians come together at an intersection, design makes the difference between collisions and safety.
Collisions at intersections between motor vehicles, cyclists and pedestrians cause many deaths and injuries. Design that considers how each group approaches intersections improves everyone's safety.
The settings on traffic lights make pedestrians wait longer by giving higher priority to vehicle traffic.
Abaconda Management Group/Wikimedia
Everyone doesn't simply wait their turn at traffic lights. Signals are set up to enable a 'green wave' for cars and adjust to heavy traffic, making walkers wait longer no matter how many there are.
Decisions made by engineers today will determine how all cars drive.
The biggest ethical challenges for self-driving cars arise in mundane situations, not when crashes are unavoidable.
Is it going to stop?
In the wake of a self-driving Uber car killing a pedestrian in Arizona, an ethicist examines the state of autonomous vehicle development.
People stroll along Moshoeshoe Street in Emfuleni.
By expanding our understanding of streets and enhancing their design, every street corner could become a space to socialise, to exercise, to play, or to trade.
It's time to turn Oxford Street into a haven for walkers.
The clock change's impact on commuter numbers highlights the need to use street lighting more effectively.
When will cars be able to talk to their surroundings?
If all the elements in the transportation system are going to talk to each other, the people at the companies and government agencies that make those items need to talk to each other too.
Beijing residents with a variety of approaches to urban air pollution.
In recent years the number of motor vehicles – and the pollution they generate – has grown astronomically, leading some citydwellers to wear facemasks in the hopes of protecting themselves. So do they work?
Sales of electric vehicles are growing fast, especially in Europe.
Shifting to plug-in cars wouldn't be enough to max out global oil consumption by 2040. But it could help make that happen if cities pitch in and ride-sharing doesn't crowd out public transportation.
What can we do to avoid clashes between users of shared paths?
The golden rule of shared paths is that the person in the less vulnerable position should be mindful of the more vulnerable user.
Not enough time to cross.
If we want older people to stay mobile, we need to look at the everday issues they encounter first.
Most road-safety initiatives prioritise a rapid clearing of the road so cars can pass.
In contrast to increases in vehicle safety over the decades, we have seen little new technology to ensure the safety of pedestrians – and current innovations are still based on a car-centric approach.