Asphalt Pavements of the Future
There will be major changes in the Hot Mix Asphalt Industry throughout the next decade and into the 21st century. Acquisitions, diversification, SHRP, the emergence of new technologies...
New Concrete and Asphalt Mixes on the Horizon
Significant research is currently 'in progress' which is intended to develop modified or new design methodologies that will result in improved pavement performance....
The Road to Drained Pavements
In California, a fast-draining base course within the pavement structure is now the preferred design. For the first time, the 1987 edition of the California Highway Design Manual recommends...
Concrete Overlays Challenge Asphalt
When a pavement needs more than minor repair but not total replacement, bonded and unbonded concrete overlays and inlays are options to consider. The article describes four projects where...
Microcomputer Applications for Pavements
The Federal Highway Administration (FHWA) has been active in exploring expanded microcomputer applications with the goal of improving efficiency and benefits to the public through reducing...
Developing a Management Maintenance (Roadway Surface) System
The Clackamas County Department of Transportation and Development is responsible for maintaining 1,514 miles of roadway. Clackamas County, Oregon is part of the Portland, Oregon metropolitan...
A Pavement Management System for Cities & Counties
A regional agency, a pavement management consultant and six cities and counties in the San Francisco Bay Area have jointly developed a Pavement Management System (PMS) which runs on a...
Automated Pavement Management Systems for Agencies
This paper presents and assesses a microcomputer software package which has been designed for use in six cities and towns in Massachusetts. The package employs a readily available database...
Role of Microcompiuters in Highway Weigh-in-Motion Systems
Microcomputer technology makes it possible to digitize the signals, calculate the desired factors, and record and display the information in real time at the weigh-in-motion (WIM) site....
The Use of Microcomputers to Perform Airport Emission Inventories
The authors found the use of LOTUS 1-2-3, a microcomputer spreadsheet package that permitted easy calculation of emissions and easy revision of data for studying options in aircraft types,...
Paving with RCC
Roller compacted concrete pavement differs from the RCC used for dams. Since 1984, when the first full scale RCC pavement in the U.S. was installed by the Corps of Engineers at Ft. Hood,...
Fast Exit
A new runway to be built at Orlando International Airport in Florida has been designed with taxiway exits based on spiral geometry that give the pilot a gentle angle for exit and a graduated...
Costs of Truck Related Highway Damage to Alaska
The cost of pavement damage to the State of Alaska for truck traffic continues to be a very controversial topic. There is no simple answer since this cost is dependent upon pavement strength,...
Survey of Airport Pavement Distress in Cold Regions
The most common pavement problems were associated with non-traffic related phenomena and included pre-existing cracks reflecting through asphalt concrete overlay (in two years or less),...
Stabilization of a Permafrost Subsidence in the Airport Runway at Bethel Alaska
During the construction of the extension to the Bethel Airport runway in 1969, it was necessary to construct a fill across a small gully. The subbase material in the gully contained some...
Reinforced Roads Bridging Voids
A mathematical model was developed to design a pavement section reinforced with a geotextile or related product to span a void. A full scale field test was conducted to verify the model....
A Thermal Analysis of Pavement Thawing
This research focuses on identifying the spring thawing period for the purpose of timing load restrictions on low to medium volume roads in frost-susceptible areas. Cases evaluated include...
Insulation Performance Beneath Roads and Airfields in Alaska
Evaluations of the long-term thermal performance of installations in Alaska for frost heave control have included sampling and testing of the insulations to determine the retained thickness,...
Shoulder Rumble Strips at Narrow Bridges
The highways in the United States have thousands of minimum design narrow bridges. Replacement of these bridges with current state of the art designs is not cost effective nor feasible...
Hazardous Events After Redirectional Collisions
The potential for hazardous events occurring to vehicle occupants after a redirection from a longitudinal barrier has not been adequately addressed. Very few studies are available which...
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