John Hennessy III,
P.E.
CAPITAL E Costs and benefits of city-wide adoption of smart surfaces across Washington, D.C., Philadelphia and El Paso to strengthen resilience, improve health and livability, reduce urban inequality, and slow global warming while saving billions of dollars. Executive Summary Cities can increase resilience, improve health and comfort, expand jobs and slow global warming through smart […]
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A Barnes Dance Intersection (also known as a “pedestrian scramble”) operates differently from a standard traffic signal-controlled intersection and allows pedestrians to cross diagonally while vehicles on all sides of the intersection are stopped at a red signal. In June 2017, DDOT put in place a Barnes Dance at 14th and Irving Street NW, which […]
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Now that the tunneling machine Bertha’s work is complete, it’s possible to fly a drone with a video camera from end-to-end inside Seattle’s SR 99 tunnel. In two minutes, you’ll see two miles of ongoing construction work. The upper roadway of the tunnel’s double-deck highway is more than 85% complete. Up next? Installation of the lower roadway, and all the systems it takes to operate a modern tunnel.
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Washington D.C. is to replace the Frederick Douglass Memorial Bridge to the tune of $441 million. AECOM is leading the design of the new bridge with Archer Western Construction and Granite Construction carrying out the project.
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Starting in the late 20th century, modern streetcar proposals started rippling across municipalities in the United States. They’re touted as infrastructure carrying benefits ranging from the social to economic and the environmental. But these projects often make appearances in the news as costly, blunder-filled experiments in public policy. Cities are willing to bet big on […]
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DC Water and the Water Environment Federation congratulate the recipients of the first certifications under the National Green Infrastructure Certification Program (NGICP). The certification is designed to meet international best practice standards while supporting community-based job creation and establishing national standards for work on green infrastructure projects. For more information, please visit www.ngicp.org.
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The ACEC 2017 Engineering Excellence Awards “Grand Conceptor” Winner: SR 520 Floating Bridge Seattle, Washington Designed by HDR.
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A national transportation panel will address Trump Administration infrastructure investment proposals, public-private partnerships, and contracting out on Monday, April 24th as part of the American Council of Engineering Companies’ (ACEC) Annual Convention, to be held at the Marriott Wardman Park Hotel in Washington, D.C.
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The SR 99 tunneling machine, Bertha, breaks through to daylight on April 4, 2017 near Seattle’s iconic Space Needle after tunneling 1.7 miles underneath downtown Seattle. See what one of the world’s largest tunneling machines looks like up close as only a drone can show.
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Clearing the debris slide blocking SR 503, 20 miles east of Woodland isn’t as easy as just removing trees and rocks from the highway. A large crack shows where the rock face of the slope has separated from the hillside, making it unsafe below. Record rainfall along with freezing temperatures aided in the debris fall. As of Friday, March 17, the slope is still moving and unstable. We shot this video using a drone, so we can start developing a permanent repair plan.
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