Roads

Welcome to the Roads Channel, a special feature that provides the user an in-depth look at the road industry. This section offers several areas to explore: product spotlights, article archives, related case studies, related video and product/supplier contact list.

Article December 28, 2000
Earlier this year, the Washington State Department of Transportation (WSDOT) started work on two large roadway projects in metropolitan King County, southeast of downtown Seattle. These involved the addition of a new driver surveillance and information system on I&shyp;405 and the installation...
Article December 28, 2000
The most important conclusion of the Federal Highway Administration (FHWA) report, Pavement Recycling Executive Summary and Report, is “pavement performance and detailed evaluations indicate that recycled HMA that is designed and controlled during production will perform comparably to conventional...
Article December 28, 2000
Rubblization is a technology that is being used more and more by highway departments around the URubblization is a technology that is being used more and more by highway departments around the U.S. The Wisconsin Department of Transportation (WISDOT) specification for rubblization differs somewhat...
Article December 28, 2000
The City of Lenoir, North Carolina, has recently completed an expansion of its Gunpowder Creek Water Reclamation Facility (WRF), that included the conversion of the four existing process treatment tanks to a four basin sequencing batch reactor (SBR) facility. The plant, owned and operated by the...
Article December 28, 2000
The Strategic Highway Research Program’s (SHRP) asphalt research was primarily aimed at the properties of asphalt binders and paving mixes and their effect on asphalt pavement performance. The study of aggregate properties, including gradation, was intentionally excluded from the asphalt research...
Article December 28, 2000
When it comes to designing pavements, it’s generally considered a good idea to keep water awayWhen it comes to designing pavements, it’s generally considered a good idea to keep water away. One method is to drain free water out through a permeable base. For some years now, states such as California...
Article December 28, 2000
Today, more municipalities and other users of cold-mix asphalt patching materials are looking for suppliers who offer an added measure of quality. However, defining what constitutes quality in exact terms is not an easy task. To manufacturers of high-performance, cold-mix patching products,...
Article December 28, 2000
Contractors and highway agency personnel continue to be optimistic about the outlook for a steady road construction market in 1996 and 1997, according to responses from readers to ROADS & BRIDGES' exclusive survey of equipment ownership trends for the two years. Responses from readers of the...
Article December 28, 2000
Blowouts, swerving, coffee spills, front-end misalignment, road construction, traffic jams, fender benders, lawsuits, higher taBlowouts, swerving, coffee spills, front-end misalignment, road construction, traffic jams, fender benders, lawsuits, higher taxes . . . these are a few of the annoyances...
Article December 28, 2000
The Strategic Highway Research Program (SHRP) ended in March, 1993. The activity of this highway program included $50 million devoted to the study of asphalt cement binder tests and specifications, as well as tests and specifications on hot-mix asphalt (HMA) materials. The end result of the SHRP...
Article December 28, 2000
Asphalt is a unique product. Although it represents a small yield, only 3%, of the U.S. refinery system, it is not a simple product to understand. No other petroleum product is affected by so many variables. The resultant supply/demand fundamentals in turn affect the prices of asphalt that...
Article December 28, 2000
Rutting of hot-mix asphalt (HMA) pavements at intersections is a problem. Rutting takes place at intersections because the HMA exhibits lower stiffness under slow moving or standing loads compared to fast moving loads. The problem is aggravated in hot weather because the stiffness of HMA is further...
Article December 28, 2000
As America observes the 40th anniversary of its Interstate Highway System in 1996, we are truly at a crossroads in laying the foundation for our nation's transportation system in the 21st century. The interstate system is generally regarded as the greatest system of highways in the world, and its...
Article December 28, 2000
With $175 billion authorized for highway funding over the next six years in the Transportation Equity Act for the 21st Century (TEA-21) asphalt and concrete paving contractors and materials suppliers will be seeing their share of dollars and work in maintenance, rehabilitation and new construction...
Article December 28, 2000
As the number of road building contracts awarded to the Milestone Co., Jacksonville, Fla., has grown over the last several years, so has the company’s need for quality hot-mix asphalt (HMA). They recently decided to install their own HMA facility to have mix when they need it and eliminate the need...
Article December 28, 2000
Chip seal disadvantages for HMA overlays Some highway agencies apply a chip seal (or seal coat) before placing a dense-graded hot-mix asphalt (HMA) overlay. Quite often the HMA placement follows immediately behind the chip seal operation. The seal usually consists of spraying an emulsified asphalt...
Article December 28, 2000
Spaghetti Bowl Location: I-15/US 95, Las Vegas Cost: $92 million Completion date: August 2000 Overview: Spaghetti Bowl project highlights include the building of 11 new bridges; the demolishing of two existing bridges; the placement of 648 precast bridge segments; the placing of 47 precast concrete...
Article December 28, 2000
Trends come and goTrends come and go. In some cases, a trend may last a couple of months, usually it only lasts about a week. Then there are trends that may eventually become the norm.The construction industry and the decision-makers involved in the purchasing of new trucks and equipment view...
Article December 28, 2000
An emerging concrete pavement technology is rapidly gaining a foothold across the nation. Known as ultrathin whitetopping (UTW), this technology is used to pave over deteriorated asphalt. The idea is to mill off the asphalt surface and pave it with concrete 2 to 4 in. thick. The concrete bonds to...
Article December 28, 2000
Aquatic Plant Nutrients The aquatic plant nutrients, nitrogen (N) and phosphorus (P) compounds, are of potential concern in urban stormwater runoff due to their ability to stimulate excessive growth of aquatic plants in receiving waters. The eutrophication (fertilization) of a waterbody can be...
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