Case Studies

With a deadline approaching, one backed by a very large fine if it were missed, officials of the city of Cleveland, Ohio, recently reopened the part of Superior Avenue that runs through Public Square downtown.   The following timeline is an overview of the circumstances that led to the reopening of...
Highway work zones are hazardous, both for drivers who must maneuver through traffic control arrangements and for construction workers who operate steps away from passing vehicles. In this environment, a split-second distraction or unexpected incident can have grave consequences. To prevent serious...
Asphalt overlays are one of the most common and well-studied roadway projects, so innovation seems unlikely, especially the kind of new idea that saves significant time and money without a major capital investment. But Rowe Construction, an Illinois paving firm, recently saved about 400 man-hours...
When a road turns into a raging river, it becomes both dangerous and damaging. This is exactly what happened in July 2013, when the city of Lebanon, N.H., was swamped with more than 4 in. of rain within 48 hours—2 in. fell in just 45 minutes. The deluge caused flash flooding, which left residents...
A large corporation in the Boulder, Colo., area experienced a serious situation on its property when a pair of 48-in. elliptical corrugated metal pipes (CMP) collapsed in the immediate vicinity of many critical utilities. The pipes were located at the very end of the storm-water system that handles...
Cleburne, Texas, located about 30 miles south of Fort Worth, is the county seat of Johnson County. Like most cities in the United States, road maintenance is a major concern there.   In 2015, Cleburne city officials knew something had to be done about the number of roads in need of repair due to...
Built circa 1921, Pittsburgh’s Beechwood Boulevard Bridge, known locally as the Greenfield Bridge, underwent rehabilitation in the 1980s. By 2013, plans to replace the aging structure were underway. The old bridge was demolished, and the erection of the new bridge began in early 2016. Reaching...
In the report titled “Development of Temporary Rumble Strip Specifications,” commissioned by the Kansas Department of Transportation (KDOT), authors Steven D. Schrock, Ph.D., P.E., F.ITE, Vishal Sarikonda and Eric J. Fitzsimmons, Ph.D. add significantly to the body of knowledge of temporary rumble...
Designed to meet the needs of this century, the New NY Bridge is built to last well into the next. To assure the longevity of the massive concrete structure, engineers and builders have added substantial precast concrete elements into the design. Bearing the load on the heavily trafficked road and...
The work of building and maintaining America’s roads and bridges relies heavily on the effective management of traffic, which includes limiting proximities among motorists, workers and equipment in construction zones.   A Federal Highway Administration (FHA) analysis of Bureau of Labor Statistics...
All great visions have to start somewhere. This one began with over 3 miles of paved multi-purpose trail winding through the scenic Clear Creek Canyon near Denver.   Installing the retaining walls was no easy task, as the terrain includes steep slopes, flooding issues along the river, active...
The North Carolina Department of Transportation (NCDOT) Bridge Maintenance Division 6 had a major erosion problem at the bridge piles underneath I-95 at Highway 87 in Cumberland County, N.C. The bridge deck above was leaking water at the joint, cascading down and eroding the slope that protects the...
Shortly after 2010, the streets of North Port, Fla. had fallen into severe disrepair—with increasingly costly maintenance.   On Nov. 6, 2012, a referendum passed authorizing the city to obtain a bond up to $46 million to upgrade substandard roads within three years.   The city promoted the project...
Central Florida’s Interstate 4 (I-4) highway is undergoing a multiyear, $2.3 billion rehabilitation project along a 21-mile stretch in Orange and Seminole counties. Originally completed in 1965, the “Orlando Expressway” has received much more traffic than it was originally meant to handle. Dubbed “...
Many corrugated metal pipe (CMP) culverts across the country will eventually experience rusting, corrosion or some form of deterioration. In the town of Ketchikan, Alaska, a 48-in. CMP culvert that ran underneath a busy two-lane road was experiencing extreme deterioration so severe that large holes...

The retaining wall creates a safe place for truck drivers to chain-up their tiers during snowy weather

The Challenge: When it snows in Vail, Colorado, it’s a skier’s dream—but for drivers, especially of trucks maneuvering steep mountain roads, it can be treacherous. To make things safer, the Colorado Department of Transportation (CDOT) wanted to widen I-70 at both sides of mountain pass locations...
Like many cities and rural communities, the city of Bel Aire, Kan., located just north of Wichita, is experiencing increased traffic growth both in volume and load. 45th Street is one of the main east-west roads through the city and connects two minor arterial roadways. The asphalt street was so...
The Virginia Department of Transportation (VDOT) upgraded an existing Road Systems Inc. (RSI) NCHRP 350-compliant SKT terminal with RSI’s new MSKT, which is MASH Test Level 3-compliant. This installation was on a busy stretch of road at a left exit off of I-64 leading to I-95 just north of Richmond...
In Baker City, Ore., two corrugated metal pipe (CMP) culverts ran underneath a two-way road. Like many of these pipe systems across the country, these two CMP culverts were rusting and deteriorating at a rapid rate. Bradley Payton, Baker City’s transportation maintenance manager, was charged with...
Yellow Creek, a tributary of the Cuyahoga River, runs through Copley, Ohio, a small township near Akron. The creek effectively divided two communities; that is, until the developer of one decided to build a bridge. In September 2016, a large-capacity all-terrain crane from ALL Erection & Crane...
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