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Showing 1 to 20 of 43 for “"Virginia Department of Transportation"”.
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Physical and Chemical Soil Properties of Ten Virginia Department of Transportation (VDOT) Mitigation Wetlands
In 1998, the Virginia Department of Transportation (VDOT) adopted standards for soil handling and amendments to improve created non-tidal wetland soil conditions. This study was conducted in sites where these new reconstruction practices were supposedly being implemented. Specific objectives were …
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Management information system infrastructure for a proposed highway management system for the Virginia Department of Transportation
The purpose of this work was to develop an infrastructure for a Management Information System concurrent with the development of a System Dynamics model for VDOT’s Highway Management System and the Interface between the two. Specifics include identifying the detailed source for each parameter or …
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Shrinkage of Latex-Modified and Microsilica Concrete Overlay Mixtures
Highway bridge decks are often overlaid to extend service life by reducing the rate of chloride ion ingress and the rate of corrosion of reinforcing steel in the sound chloride-contaminated concrete that is left in-place. Bridge deck overlays in Virginia are usually either latex-modified concrete …
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Hydrologic Variations Within Created and Natural Wetlands in Southeastern Virginia
<p>The hydrology of wetlands, particularly how wetland soils collect, store, and redistribute water strongly affects how wetland systems function. In created wetlands, construction processes and materials influence the hydrology and consequently, the potential for successful reestablishment of …
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An analysis of palustrine forested wetland compensation effectiveness in Virginia
… wetland losses has become a common feature of permit requests. The purpose of this project is to suggest a methodology for quantifying the effectiveness of palustrine forested wetland construction in Virginia. Wetlands constructed by ~ne Virginia Department of Transportation and the U.S. …
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Manufacture and rehabilitation of guardrail posts using composite fabrics
The West Virginia Department of Transportation (WVDOT) uses approximately 50,000 wood and 200,000 steel guardrail posts on an annual basis. The need to develop guardrail posts made of a different material is motivated by the high cost of steel, along with the greater difficulty associated with …
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Use of Ultimate Load Theories for Design of Drilled Shaft Sound Wall Foundations
… investigate the factors that affect the accuracy of the procedures used by the Virginia Department of Transportation for design of drilled shaft sound wall foundations. Field load tests were performed on eight inch and nine inch diameter drilled shafts, and the results were compared to theoretical …
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Transverse Sub-Assemblage Testing of the Inverted-T Bridge System
… bridge construction technique that consists of precast inverted-T girders placed adjacent to one another and covered with a cast-in-place deck. This system was first implemented in the U.S. by the Minnesota Department of Transportation (Mn/DOT). This research focuses on improving the …
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Use of West Virginia permanent traffic recorder data to develop factors for traffic and truck variation
The purpose of this study was to use data collected from the 52 permanent count stations located throughout the state to develop four sets of factors that would assist the West Virginia Department of Transportation (WVDOT) in the management and engineering of the roadways in West Virginia.;The …
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Quality Assurance for Chip Seals Using Mean Profile Depth
… a pavement preservation treatment. The quality of the chip seal is assessed through various parameters, including texture depth, skid resistance, and visual evaluation. Current practice reveals that transportation agencies conduct quality assurance after construction, while contractors are …
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Evaluation of concrete bridge deck overlays
… have been used by many states for the protection of bridge decks, but the premature delaminations and failures have been observed in many cases. A comprehensive study was recently defined to investigate overlay performance in collaboration with the West Virginia Department of …
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Geospatial Framework for the Use of Natural Resource Extraction in Public Private Partnerships
Resources for the maintenance and expansion of existing highway infrastructure are scarce. Public Private Partnerships (PPP) are feasible solutions to the concern of lagging investment. PPP are increasingly used for the procurement of services and goods, because of their flexibility and ability to …
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Development of Enhanced Pavement Deterioration Curves
… exist that incorporate the structural capacity of the pavements into deterioration modeling. This thesis develops pavement deterioration models that take into account, along with the age of the pavement, the pavement structural condition expressed in terms of the Modified Structural Index (MSI). …
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A geometric programming based procedure to design bridge superstructures
… relies heavily on the past experience of the designer and is extremely time consuming and costly to try out alternative designs. Typically, a designer is more concerned about satisfying the design requirements laid down by the American Association of State Highway and Transportation …
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Development of Concrete Shrinkage Performance Specifications
… life, concrete experiences volume changes. One of the types of deformation experienced by concrete is shrinkage. The four main types of shrinkage associated with concrete are plastic, autogeneous, carbonation and drying shrinkage. The volume changes in concrete due to shrinkage can lead to the …
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Performing Network Level Crash Evaluation Using Skid Resistance
Evaluation of crash count data as a function of roadway characteristics allows Departments of Transportation to predict expected average crash risks in order to assist in identifying segments that could benefit from various treatments. Currently, the evaluation is performed using negative binomial …
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Approaches to wildflower meadow establishment
Several aspects of wildflower meadow establishment using native Virginia herbaceous perennial species were investigated. The initial task lay in identifying the truly native species from those European introductions which have successfully naturalized in the state. Germination testing was conducted …
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Shade, Moisture, and Woody Vegetation in Stormwater Management Basins: Influence on Cattail (Typha spp.) Growth
… basins (SWMB) are used to mitigate urban runoff. The Virginia Department of Transportation relies on dry detention basins planted with mowed turfgrass. However, these basins often retain water; resulting in cattail (Typha spp.) and tree colonization. Managing agencies request cattail …
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A Methodology for Estimating the Level of Aggressiveness in Competitive Bidding Markets
… is awarded to the lowest bidder, is a basic part of the construction industry. This method of project delivery is designed to promote healthy competition in an attempt ensure the lowest price for the project. A contractor knows that lowering a bid price increases his probability of being awarded …
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District Level Preventive Maintenance Treatment Selection Tool for Use in Virginia
… by retarding future pavement deterioration. The Virginia Department of Transportation uses its pavement management system to determine maintenance targets for each district. The districts then use these recommendations to select pavements that will receive maintenance and the types of treatments …
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