News

Infrastructure Security Article December 28, 2000
First,a transducer is defined as a device that converts one form of energy to another. Usually that means mechanical, light, heat into electricity, or electricity into mechanical, light, heat, etc. For water/wastewater applications, we need to consider the former. In this article, we'll talk about...
Winter Maintenance Article December 28, 2000
Gravel and salt used to be the mainstay of ice-control regimens for most DOTs. However, the world has become increasing sophisticated, and so have the methods of controlling ice on bridges and pavements. Prewetting salt has grown in popularity; this process increases the efficacy of salt, which is...
Winter Maintenance Article December 28, 2000
Call it the "snowstorm of the century." Call it-as did one Washington, D.C. snow coordinator-a "catastrophe." Call it whatever you like, but most state and local snow-management officials have labeled the relentless series of storms that hit the eastern and southeastern U.S. this past January...
Software Article December 28, 2000
Olympic athletes strive and train hard for the ultimate prize-Olympic gold. And, while the gold is being won and records broken, the spectators, who drive to the Olympic venues scattered throughout the city, will probably take for granted the award winning efforts of the Georgia DOT (GDOT), which...
Highway Construction Article December 28, 2000
The first use of fabrics in reinforcing roads was attempted by the South Carolina Highway Department in 1926. A heavy cotton fabric was placed on a primed earth base, hot asphalt was applied to the fabric, and a thin layer of sand was put on the asphalt. The department published the results of this...
Winter Maintenance Article December 28, 2000
The blizzards that raged across the country this winter have emphasized how snow and ice can bring a city to a stand still in a matter of hours (see The Blizzard of '96, 3/96). Even a few inches of snow has the ability to disrupt travel if left unattended. That is why it is so important to have a...
Article December 28, 2000
Remember the Swiss Army knife you had as a teenager? Not just a knife, this versatile tool contained fold-out attachments that performed tasks as diverse as sawing a log or popping the cork on a bottle of vintage wine. Odds are, you still carry one of these tools, or have one stuck somewhere...
Asphalt Article December 28, 2000
While virtually everyone in the industry is familiar with the term "Superpave," there still appears to be some confusion over just what Superpave is. To begin with, let's clarify what Superpave isn't: a tangible product. Superpave is an asphalt mix-design process. The resulting hot-mix asphalt is...
Infrastructure Security Article December 28, 2000
Louisville Water has increased its minimum coagulant dosage by using liquid borne-particle counters to measure water quality at particle levels, where turbidimeters are not as effective. Laboratory experiments have shown that particle counters are able to accurately measure filter and coagulant...
Bridges Article December 28, 2000
When American troops arrived at the banks of the Sava River, which forms the nothern border between Croatia and Bosnia, they were faced with the first obstacle to their peacekeeping mission in Bosnia. The river's bridges had been destroyed or damaged during the many years of fighting and could not...
Asphalt Article December 28, 2000
This is the '90s, and ways of doing business have changed with the times, even for those in the asphalt-paving industry. While most paving projects are "kicked off" with the milling of existing pavement or surveying for a new road, the I&shyp;26 and Piney Grove Road Project in South Carolina...
Asphalt Article December 28, 2000
Hot-mix asphalt (HMA) producers and contractors are today faced with many industry changes, which will effect various areas of the industry including specifications, technology, restructuring and regulatory activities. Without the proper information these changes may overwhelm one, leaving them in...
Article December 28, 2000
In August, while meeting for its annual executive session, the AASHTO-AGC-ARTBA Joint Committee signed policy statements addressing work-zone safety and the traveling public, long-term transportation needs funding and continuous quality improvement in the construction process. The Joint Committee's...
Asphalt Article December 28, 2000
Maryland, like most other states, has certain intersections that are prone to rutting. The reasons may differ from one intersection to another-one may have heavy truck traffic; another may be located at the base of a hill-but the result is always the same: Rutted roads that slow traffic and require...
Engines Article December 28, 2000
Last spring, just a few weeks after Cummins Engine Co. unveiled a new 525 hp powerplant for big trucks, the engine division of arch-rival Caterpillar recaptured the power lead in the truck diesel field by introducing a 550 hp version of its 3406E diesel. Despite the facts that increased horsepower...
Asphalt Article December 28, 2000
While the actual number of "Superpave miles" in Wisconsin's roadway system is low-approximately 4 to 5 miles-it has made an impression that greatly exceeds its physical presence. Tom Brokaw, asphalt, aggregate and soils engineer at the Wisconsin DOT, says the department has been very happy with...
Infrastructure Security Article December 28, 2000
Cost-effectiveness and efficiency are important factors in selecting a treatment process that will comply with both current and anticipated water quality regulations. One cost-saving process that shows great promise for treating high-quality water sources is extreme/high-rate serial filtration (...
Article December 28, 2000
Changes, differing site conditions and delays are events that frequently occur on complex highway- and bridge- construction projects. Federal, state and local government owners typically ask contractors for proposals to perform the changed work or remedy the differing site conditions if there is...
Fleet Management Article December 28, 2000
Logistics. That's the new buzzword in truck management, and truck management has a way of attracting buzzwords. About 25 years ago, full-service leasing was advanced as a plan that would ease many problems of truck operation. For instance, paying the steadily rising cost of new trucks along with...
Infrastructure Security Article December 28, 2000
Forty years after President Eisenhower launched the interstate era, connecting America's major cities through a network of superhighways, Secretary of Transportation Federico Peña has called for the nation to begin a new era in surface transportation built around a high-tech version of those same...
Overlay Init