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Articles on Traffic

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Self-driving cars could lead to increased traffic and pollution if they spur more travel by car. Witthaya Prasongsin via Getty Images

Driverless cars won’t be good for the environment if they lead to more auto use

Studies show that when people can ride in a car without having to operate it, they increase their car use. That could increase traffic and pollution, unless government puts a price on car travel.
Low-cost air-ventilation systems have been installed in many classrooms across the U.S. to help reduce COVID-19 transmission. Halfpoint Images/Moment via Getty Images

COVID-19 has spurred investments in air filtration for K-12 schools – but these technologies aren’t an instant fix

Air-ventilation upgrades have been badly needed in U.S. classrooms since long before the pandemic. Low-tech filtration systems that cost about the same as a textbook per student can make a big difference.
The likelihood of commuting during both peak periods was slightly lower for telecommuters than for workers who commuted to work. (Shutterstock)

Telecommuting can reduce congestion, but might create other traffic problems

The potential benefits of telecommuting could quickly be erased because of the behavioural changes it brings about in the medium and long term.
It’s back: Rush-hour traffic in Los Angeles on June 15, 2021. Carolyn Cole / Los Angeles Times via Getty Images

As urban life resumes, can US cities avert gridlock?

The pandemic offered a tantalizing look at city life with fewer cars in the picture. But with traffic rebounding, there’s limited time to lock in policies that make streets more people-friendly.
Left turns are dangerous and cause a lot of unnecessary traffic. Chris Jongkind/Moment via Getty Images

Sick of dangerous city traffic? Remove left turns

Left turns are dangerous and slow down traffic. One solution? Get rid of them. New research shows that limiting left turns at busy intersections would improve safety and reduce frustrating backups.
A tiger crosses a road in India’s Ranthambore National Park. Aditya Singh/AFP via Getty Images

GPS tracking could help tigers and traffic coexist in Asia

An infrastructure boom threatens endangered tigers across Asia. Scientists want to know more about how tigers behave near roads so they can design wildlife-friendly transportation networks.
An estimated 29 million mammals are killed each year on European roads. (Shutterstock)

Wildlife can be saved from becoming roadkill with a new tool that finds the best locations for fences

Roads and traffic are causing massive mortality of wild animals worldwide and the road network is rapidly expanding. Can the wildlife death toll be stopped?

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