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The Council Bluffs Interstate System (CBIS) needed an overhaul. It was constructed as part of the Eisenhower Interstate System in the 1960s and, apart from routine maintenance, has remained virtually unchanged since. Packed with traffic and frequent crashes, the Iowa corridor no longer met current…
December 02, 2021
The Highway 141 flyover bridge was the cornerstone to resolving congestion. Located at the convergence of I-80 and I-35 in the northwestern quadrant of Des Moines, Iowa, not only was the flyover a critical element of the overall interchange design, but also for the planning and design of adjacent…
December 02, 2021
Raiko T model Icebreaker is another machine capable of addressing dense ice pack without the need for chemical deicing intervention.
Raiko T model Icebreaker is another machine capable of addressing dense ice pack without the need for chemical deicing intervention. Image: http://team-eagle.ca/equipment/raiko/
The American driving public has high expectations of road conditions during winter months, and state and local transportation agencies work diligently to provide motorists, emergency services, and commercial traffic with safe and passable roads. Since the 1960s, this has led to a steady increase in…
September 08, 2021
Rapid developments in mobile light detection and ranging (LiDAR) scanning over the last 15 years have opened the door to many additional applications of the technology in a variety of environments, from city streets and railways to waterways and highways. Advances in sensor electronics and hardware…
September 08, 2021
Speed Limits are easily reduced during construction activities and motorists are informed of their actual speed with Ver-Mac Speed Wizards from Street Smart.
Speed Limits are easily reduced during construction activities and motorists are informed of their actual speed with Ver-Mac Speed Wizards from Street Smart.
Today more than ever, we have all grown accustomed to getting whatever we want, quickly.  Just last weekend, for example, in between games at my son's baseball tournament, within 26 minutes from start to finish, I ordered, received, and demolished a Jimmy John’s sandwich (with Kick’n ranch sauce,…
August 18, 2021
Iowa’s $1.5 billion freeway reconstruction hits a major milestone with miles yet to go
All images: HDR
The Iowa Department of Transportation (IDOT) hit a major milestone this spring with the opening of the dual, divided freeway in Council Bluffs. This design separates through traffic on I-80 from local traffic on I-29, creating I-80 express lanes and I-29/I-80 local lanes. Part of the larger $1.5…
July 07, 2021
Sustainable soybean oil-derived Invigorate Rejuvenator has shown to decrease asphaltene composition through high-level neutron testing.
Sustainable soybean oil-derived Invigorate Rejuvenator has shown to decrease asphaltene composition through high-level neutron testing.
Recycling and the asphalt industry are virtually synonymous. The first documented uses of recycled asphalt date back to the early 1900s. In the 1970s, two converging factors ushered in the modern era of producers using reclaimed asphalt pavement (RAP) as part of mix designs. First, the oil embargo…
February 03, 2021
E&B Paving crew places a concrete overlay on S.R. 3 in Henry and Delaware Counties, Indiana. The pavement was 9 in. thick with variable thicknesses at bridge transition areas.
E&B Paving crew places a concrete overlay on S.R. 3 in Henry and Delaware Counties, Indiana. The pavement was 9 in. thick with variable thicknesses at bridge transition areas.
The first documented use of concrete to resurface pavements dates back to 1901. That first concrete overlay was one of 15 placed between 1900 and 1915, a fact that might surprise some people, considering that the first concrete pavements were placed in 1892 and 1893. Although overlay technology has…
January 06, 2021
Fiat lux. Often sourced from its mention in the Book of Genesis, meaning “Let there be Light.” Cedar Falls, Iowa is home to the University of Northern Iowa, whose motto is simply “Lux,” or “light.” This nearly 150-year-old bastion of learning is both Cedar Falls’ largest employer and the primary…
July 15, 2020
The era of 2-D paper plans for roads and bridges may be coming to an end. As design technology continues to advance, pilot projects across the U.S. are proving that these printed sheets are no longer always needed. Just as CAD replaced hand-drawn plans decades ago, a new technology is emerging for…
May 13, 2020
The National Asphalt Pavement Association (NAPA) unveiled at a ceremony during the association’s 65th Annual Meeting in Maui, Hawaii, its annual Quality in Construction award winners.  As in years past, Roads & Bridges here brings you a look at some of the winners. Though NAPA bestows these…
March 02, 2020
Crews working off a 3D BrIM model; image courtesy of Zenith Survey
Crews working off a 3D BrIM model; image courtesy of Zenith Survey
Government agencies are under pressure to optimize limited resources while also responding to increasing demands for better performance. Across the country, deficient bridges are a growing problem. The U.S. has 614,387 bridges, almost four in 10 of which are 50 years or older. More than 54,000…
September 12, 2019
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