The railings on a bridge in Nanjing, China, were so unstable that the bridge was deemed unsafe. A company used a 3D printer to create stronger concrete railings that cost less and required less time than traditional work.
The US military plans nearly $500 million worth of improvements at the Guantanamo Bay naval station in Cuba, including new barracks, military housing and a migrant tent city. However, the $250 million planned hospital has raised concern in Congress, which will study that proposed project.
The Minnesota Department of Transportation wants a way to more accurately model transportation construction and maintenance projects and is looking at different software to develop a "mesoscopic-scale dynamic traffic assignment model." This article explores the process the agency used, what it learned, and what will come next.
Interstate 270 outside Washington, D.C., is the most congested corridor in Maryland, and Gov. Larry Hogan plans to invest $230 million to improve it. The state plans $560 million to improve roads in the Montgomery County and will soon begin asking transportation firms for ideas on the I-270 the project, and the goal is to use that project as a model for other work.
Labor Day Weekend is approaching, which means it's almost time for the Annual Bridge Walk in Michigan. The event usually draws between 30,000 and 60,000 people, and participants will have to use official shuttles to cross the Mackinac Bridge, according to the Mackinac Bridge Authority.
A $16.8-million construction project is set to start in the Detroit-Windsor tunnel to replace an 85-year-old ceiling slab. Nighttime tunnel closings could begin in November and last through the middle of 2018.
New York Gov. Andrew Cuomo wants to implement congestion pricing on roads and bridges around New York City, but the city's mayor is skeptical that it will happen. Mayor Bill de Blasio thinks it's a viable idea, but does not believe Republicans in the legislature will approve it.
A geotextile fabric anchored with rock will soon protect waterfront properties from erosion along New Brunswick's Nashwaak River. Contractors and members of the Nashwaak Watershed Association are now busy with installation, maintaining that the bioengineered technique is superior to rock walls.
Jet erosion tests used to evaluate two fluvial erosion models -- the empirical excess shear stress model and the mechanistic Wilson model -- found that erodibility parameters varied by two to five and one to two orders of magnitude in Oklahoma's Illinois River watershed and Fort Cobb Reservoir watershed. However, there was less variation in predicted retreat by a process-based model compared with the input erodibility parameters.