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Articles on Roads

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Low-quality asphalt binder — the glue that holds roads together — can leave roads prone to cracking in cold temperatures. (Shutterstock)

How Canada’s oilsands can help build better roads

The quality of asphalt binder — the glue that holds roads together — influences their condition. Binder made from Alberta bitumen is low in waxes and could extend pavement lifespan.
Fresh grizzly bear tracks in Yellowstone National Park. Jacob W. Frank, NPS/Flickr

Linking protected areas from Yellowstone to the Yukon shows the value of conserving large landscapes, not just isolated parks and preserves

Parks and refuges are important for conservation, but without connections, they’re like islands. Linking them by protecting land in between makes it possible for wildlife to move over bigger areas.
Tourists cross a hanging bridge in the treetops of Costa Rica’s Monteverde cloud forest. Matthew Williams-Ellis/Universal Images Group via Getty Images

Protecting biodiversity – and making it accessible – has paid off for Costa Rica

Tourism revenues account for almost 10% of Costa Rica’s gross domestic product. New research shows that charismatic wildlife is necessary but not sufficient to attract ecotourists.
The road leading to the Etosha National Park East Gate at Fort Namutoni, Etosha National Park, Namibia. Getty Images/ Alexander Hafemann

Africa’s growing road network may affect ecosystems: we reviewed the evidence

The presence of roads, even inside protected areas, may pose a significant threat to species.
The Denali Highway as it crosses the Susitna River. Joe Sohm/Visions of America/Universal Images Group via Getty Images

Infrastructure bill passed by Congress promises billions for bridge repair – rural Alaska shows the growing need as temperatures rise

Alaska is warming faster than any other U.S. state, and that’s causing problems, a team of bridge engineers and social scientists explains. The infrastructure bill in Congress would offer some help.
Interstate 980 cuts off West Oakland, Calif., at top, from other Oakland neighborhoods. Jane Tyska/Digital First Media/East Bay Times via Getty Images

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.
In 1872, John Gast painted ‘American Progress,’ showing trains and roads spreading across the American West. John Gast, Library of Congress via Wikimedia Commons

Infrastructure spending has always involved social engineering

Government investment in roads, railroads and other public services has always involved social programming, both for good and for ill.

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