Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"State DOTs"”.
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Design and Construction of Pavements in Cold Regions: State of the Practice
… roadways in cold regions throughout the United States. The penetration of frost into pavement structures can lead to differential frost heave during winter and thaw weakening during spring. Both of these damage mechanisms lead to premature pavement distress, structural deterioration, and poor …
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Optimizing the construction planning of highway work zones
… The Federal Highway Administration (FHWA) and state DOTs are continuously seeking to improve work zone safety and mobility. To accomplish this, the layout of highway work zones needs to be carefully planned and optimized to accomplish the multiple and often conflicting objectives of maximizing …
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Efficacy of Speed Monitoring Displays in Increasing Speed Limit Compliance in Highway Work Zones
… a concern among Departments of Transportation (DOTs) throughout the country as the highway network has begun to age and more maintenance and construction work has been necessary. Safety in highway work zones is more compromised than in other areas for two reasons. First, the construction workers …
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Characterization of waste recycled glass as a highway material
… also the debris level in the cullet. A survey of State DOTs was done to determine their experiences with the use of glass cullet. Also, a survey among suppliers of cullet in Texas was done to determine the costs associated with procuring glass cullet. Based on these surveys, glass cullet was …
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Optimizing Lighting Conditions for Nighttime Highway Construction Operations
… lighting standards adopted by different DOTs. The framework can be utilized by state DOTs as performance-based criteria that quantifies and assigns the required lighting levels for various construction tasks. Second, a lighting design model, ""CONLIGHT"", is developed for nighttime …
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Investigation of Ultra-High Performance Concrete for Longitudinal Joints in Deck Bulb Tee Bridge Girders
In recent decades, many state DOTs have implemented ultra-high performance concrete (UHPC) in bridge construction because of its advanced mechanical properties beyond those of conventional concrete. The Federal Highway Administration (FHWA) has extensively tested a proprietary class of UHPC, but …
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Development and estimation of traffic data-based operational measures for effective winter snow management
… types of operational measures used in the state DOTs in the US, the traffic data-based operational measures that can quantify the effects of snow plowing activities are still lacking. To be sure, the existing approaches developed to date employed the variations of traffic speed or travel …
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Assessing the rise of Design-Build-Finance Delivery in Transportation Infrastructure
… of transportation infrastructure by five State DOTs: Florida, North Carolina, Georgia, Michigan and Texas through a combination of interviews with DOT personnel and investigation of completed or on-going DBF projects. To complement this, subject matter experts (SMEs) were interviewed to …
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The relationship between procurment duration and design-build success in transportation projects
State Departments of Transportation (DOTs)are increasingly interested in developing new strategies for the design and construction of transportation projects. As a result, they are adopting more integrated process. Projects that previously used separate steps and parties may now be included in a …
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A Review of Road User Cost Methods and Methodology
<p>This study was designed to review state-of-the-practice road user cost (RUC) calculations, evaluate current SDDOT methodology, propose improvements and implement them in a new analysis worksheet for use by SDDOT. This report includes an extensive literature review and the results of targeted …
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Evaluation of Resistivity Meters for Concrete Quality Assurance, Project TR201414
… relationships provided by AASHTO and other state DOTs. The structural mixture containing 50% Class F fly ash had the best performance with “very low” chloride ion penetrability at 90 days. A ternary paving mixture with 20% Class C fly ash and 30% slag replacement for cement also demonstrated …
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Development of a Comprehensive Framework for the Efficiency Measurement of Road Maintenance Strategies using Data Envelopment Analysis
… developed and implemented by researchers and state departments of transportation (DOTs) mainly focus on the effectiveness measures, e.g., the level-of-service. Such measurement systems do not sufficiently elaborate on the efficiency concept, e.g., the amount of resources utilized to achieve …
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A framework for guiding transportation improvements to support desired land use
… This dissertation describes in detail how MPOs, state DOTs, and other planning agencies can create an integrated transportation-land use model from the ground up or create it as an extension to their existing analytical tools to bridge the gap between the two models. The dissertation identifies …
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Sustainable Pavement Construction: Developing a methodology for integrating environmental impact into the decision making process
… decision-making. Despite this, the United States has neither a national policy on sustainability, nor a national sustainable transportation strategy. In many cases this has resulted in state DOTs basing their environmental practices on requirements set out previously by EPA regulations with …
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Development of Performance Warranties for Performance Based Road Maintenance Contracts
… has a few number of applications in the United States up to date. Nonetheless, the US Department of Transportation has vigorously promoted (by issuing memorandums to be distributed to the Highway Agencies and State Departments of Transportation) the conversion of traditional contracts to …
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Improved Load Distribution for Load Rating of Low-Fill Box Structures
… then divided by the live load demand. All the state DOTs are required to inspect and assess culvert conditions and capacities by load rating in every two years. The distribution of live loads on the top slab of a box culvert plays a major role in determining the rating factor of the culvert. …
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Advancing strategic focuses through performance-based evaluation – the growth of state dot approaches
… have substantially grown in importance and use. States are examining their existing processes to ensure increases in transportation system performance over time. Certain states have developed internal processes that demonstrate use of a performance-based approach that effectively integrates both …
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Evaluation of glare and lighting performance in nighttime highway construction projects
… glare; (6) available recommendations by State DOTs and professional organizations to control glare; and (7) existing guidelines and hardware for glare control. The second task involved site visits to a number of nighttime work zones to identify practical factors that affect the …
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Quantifying the Service Life and Potential Environmental Benefits of Recycled Asphalt Pavements
… provides an update and examines the current state of pavement recycling techniques, highlighting trends in the various recycling methods, examining what is and is not working from the agency perspective, and assessing the progress made in the last decade through a web-based survey. The survey …