Methodology To Convert A Transportation Planning Origin-Destination Matrix Into A Microscopic Traffic Simulation Origin-Destination Matrix,
2011
University of Texas at El Paso
Methodology To Convert A Transportation Planning Origin-Destination Matrix Into A Microscopic Traffic Simulation Origin-Destination Matrix, Jose Osiris Vidana-Bencomo
Open Access Theses & Dissertations
Microscopic traffic simulation (MTS) is a cost-effective approach for the evaluation of traffic conditions in urban highways networks. In MTS models, traffic demand that is entered into the network is specified by one or several Origin-Destination (O-D) matrices. A major challenge in the application of MTS for large urban networks is the specification of the O-D matrices. This dissertation proposes a methodology that may be used to transform a O-D matrix from a transportation planning model (which is based on Traffic Analysis Zone, or TAZ, and is readily available) into a O-D matrix for a MTS model (which is traffic …
Evaluation Of Nondestructive Technologies To Assess Presence And Extent Of Delamination Of Hot Mix Asphalt Airfield Pavements,
2011
University of Texas at El Paso
Evaluation Of Nondestructive Technologies To Assess Presence And Extent Of Delamination Of Hot Mix Asphalt Airfield Pavements, Manuel Celaya
Open Access Theses & Dissertations
Sufficient bonding between the hot mix asphalt layers is essential to ensure the desired structural capacity of a pavement. Delamination or debonding problems are particularly more severe on airfield pavements, due to higher traffic loads applied by aircrafts. Further progression of delamination may result in stripping of the lower layers due to the intrusion of moisture or may develop other dangerous distresses such as foreign object debris. The existing nondestructive testing procedures and equipment that have the potential to address the problem were identified and their effectiveness and potential for success were evaluated. The Ground Penetrating Radar, Falling Weight Deflectometer, …
Impact Of Truck Suspension And Road Roughness On Loads Exerted To Pavements,
2011
University of Texas at El Paso
Impact Of Truck Suspension And Road Roughness On Loads Exerted To Pavements, Shahram Misaghi Bonabi
Open Access Theses & Dissertations
A software package, called IntPave, an Integrated Pavement Damage Analyzer, was developed at the Center of Transportation Infrastructure Systems at The University of Texas at El Paso with the capacity to calculate the pavement distress for flexible pavements under any type of traffic load, and to make a comparison of the level of distress caused by a standard and a non-standard, assuming statically exerted loading. However, what has been lacking is a tool to measure the dynamic impact on the pavement due to vehicle-road interaction. In this report, the interaction of truck suspension systems with the roughness of the road …
Adaptation Of Low Impact Design To The Desert Southwest,
2011
University of Texas at El Paso
Adaptation Of Low Impact Design To The Desert Southwest, Abubaker Ali Alamailes
Open Access Theses & Dissertations
A low Impact Development (LID) practices were used to design an Integrated Management Practices (IMP) system for a residential lot .The design was adapted to the Desert Southwest region based on twenty years of climate data including precipitation and temperature for three representative cities: El Paso, TX, Albuquerque, NM, and Phoenix, AZ. In order to capture stormwater runoff close to its source and to provide as much stored water as possible for plants, LID practices including bioretention cells and vegetated swales were applied throughout the lawn. The purpose of the design is to maintain the pre-development hydrologic characteristics of the …
Improving Safety And Mobility At High-Speed Intersections With Innovations In Sensor Technology,
2011
University of Nebraska - Lincoln
Improving Safety And Mobility At High-Speed Intersections With Innovations In Sensor Technology, Anuj Sharma, Darcy M. Bullock, Senem Velipasalar, Mauricio Casares, Jacob Schmitz, Nathaniel P. Burnett
Department of Civil and Environmental Engineering: Faculty Publications
A series of innovations has been made in the vehicle sensors field. Technologies such as IntelliDrive and radar-based smart sensors make it possible to track each vehicle in proximity to an intersection. However, current technologies have limitations, such as lack of robustness, accuracy, or level of penetration. This paper assumes an accurate wide-area detector (WAD), which might be soon available, and highlights the potential benefits that might be derived in safety and efficiency of operations at high-speed intersections from the deployment of the WAD. Two critical areas in which wide-area detection can lead to significant improvements are discussed: (a) location …
Experimental Damage Diagnosis Of A Model Three-Story Spatial Frame,
2011
University of Mississippi
Experimental Damage Diagnosis Of A Model Three-Story Spatial Frame, Samantha Sabatino
Electronic Theses and Dissertations
Structural damage can be induced by a variety of events from short-term abnormal stresses to long-term natural aging. Detection of changes in a structure's ability to withstand subsequent loads can aid decisions on safety, repair, rehabilitation, and demolition. Dynamic property shifts can show internal cracks and minor damage before propagation or failure occurs, but only if a proper indicator is selected. In order to evaluate potential damage indices, a three-story metal frame building was constructed. Using Star Modal software, dynamic structural properties were obtained from modal decomposition on experimental tap test responses. The natural frequencies and mode shapes of the …
Column Capacity Evaluation For Low-Rise Moment Frame Steel Buildings In Mississippi Subject To Wind And Seismic Hazards,
2011
University of Mississippi
Column Capacity Evaluation For Low-Rise Moment Frame Steel Buildings In Mississippi Subject To Wind And Seismic Hazards, Yihong Shi
Electronic Theses and Dissertations
For the design of steel frame structures, AISC outlines approaches of second-order analysis. In this study, two of these approaches are considered: Amplified First-Order Analysis Method and Direct Analysis Method. The methods were studied using SAP2000. Amplification of moments in a two-story plane frame subject to a wind load case is computed using both methods and shown to be of comparable magnitude for small deformations. ASCE/SEI 7 and IBC provisions were used to develop lateral design load conditions for the frames. In this study, a hypothetical building was assumed to be constructed in four different locations (Southaven, Batesville, Jackson and …
Improved Joining Method For Segmental Prestressed Structures,
2011
University of Texas at El Paso
Improved Joining Method For Segmental Prestressed Structures, Ralph Warren Jensen
Open Access Theses & Dissertations
This dissertation addresses the need for more robust and materially efficient structures, specifically structures that absorb higher levels of energy, can self-erect and which have variable reaction capabilities. These structures can take much higher levels of strain and loading compared to current technologies in reinforced concrete and carbon fiber composites. These structures are made using a novel method of joining segmental elements. A great advantage with this segmental structural system is it's survivability under overloaded conditions. During an impact, or concentrated pressure load, the structure will wrap around the impact zone thereby widely distributing the contact stresses. This function or …
Development Of A New Mix Design Method And Specification Requirements For Asphalt Treated Bases,
2011
University of Texas at El Paso
Development Of A New Mix Design Method And Specification Requirements For Asphalt Treated Bases, Hector Antonio Hernandez
Open Access Theses & Dissertations
Asphalt stabilized bases in Texas are usually designed and constructed as per Item 292, "Asphalt Treatment (Plant Mixed)," of the 2004 Standard Specification book. This specification is a hybrid of base and hot mix asphalt concrete procedures and requirements, which are sometimes incompatible. In addition, this Item uses a specific Texas Gyratory compactor that is not readily available to all districts. Some districts have started using test method Tex-204-F, Part III, `Mix Design for Large Stone Mixtures Using the Superpave Gyratory Compactor." However, this procedure was originally developed to design Type A and Type B hot mix at 96% density …
Bs News January/February,
2011
Technological University Dublin
Impact Of Signal Timing Information On Safety And Efficiency Of Signalized Intersections,
2011
University of Nebraska at Lincoln
Impact Of Signal Timing Information On Safety And Efficiency Of Signalized Intersections, Anuj Sharma
Department of Civil and Environmental Engineering: Faculty Publications
Signalized intersections are provided in traffic networks to improve the safety and efficiency of vehicular and pedestrian movement. There are various measures under education, enforcement and engineering headings that are being attempted to improve safety and efficiency of operations at a signalized intersection. Provision of signal countdown timer, a timer showing the remaining red and green time in a phase, is one such measure and is commonly adopted in India. However, studies on effects of countdown timer under Indian traffic conditions are very scarce. Traffic heterogeneity and lack of lane discipline makes transferability of models developed in other countries (with …
Role Of Information On Probability Of Traffic Conflict On The Onset Of Yellow,
2011
University of Nebraska - Lincoln
Role Of Information On Probability Of Traffic Conflict On The Onset Of Yellow, Nathaniel P. Burnett, Anuj Sharma
Department of Civil and Environmental Engineering: Faculty Publications
This paper examines the effect of information provided to drivers through advance warning flashers (AWFs) on driver’s probability of conflict at the onset of yellow at a high-speed intersection. AWFs are specifically designed to minimize the number of vehicles trapped in their respective dilemma zones at the onset of yellow. A probit modeling technique was used to establish dilemma zone boundaries. Based on the dilemma zone boundaries probability of a perceived conflict curves was computed and compared against actual conflicts observed at each of the studied intersections. The comparison between the actual and theoretical probability of conflict curves generated a …
Role Of Information On Probability Of Traffic Conflict On The Onset Of Yellow,
2011
University of Nebraska - Lincoln
Role Of Information On Probability Of Traffic Conflict On The Onset Of Yellow, Nathaniel P. Burnett, Anuj Sharma
Department of Civil and Environmental Engineering: Faculty Publications
This paper examines the effect of information provided to drivers through advance warning flashers (AWFs) on driver’s probability of conflict at the onset of yellow at a high-speed intersection. AWFs are specifically designed to minimize the number of vehicles trapped in their respective dilemma zones at the onset of yellow. A probit modeling technique was used to establish dilemma zone boundaries. Based on the dilemma zone boundaries probability of a perceived conflict curves was computed and compared against actual conflicts observed at each of the studied intersections. The comparison between the actual and theoretical probability of conflict curves generated a …
Circulation, Sediment Concentration And Oxygen Depletion In The Tidal Ems River,
2011
Portland State University
Circulation, Sediment Concentration And Oxygen Depletion In The Tidal Ems River, Stefan A. Talke, Huib E. De Swart
Civil and Environmental Engineering Faculty Publications and Presentations
We present measurements which show that the tidal Ems River in Germ any is extremely muddy over a 30 km + turbid zone, with fluid mud o f 1-2 m thickness covering the bed with suspended sediment concentrations (SSC) o f greater than 50 kg.m-3. Moreover, we show that these elevated SSC contain large quantities of organic material which deplete dissolved oxygen (DO) and produce summertime hypoxic zones. Using mathematical modeling, we develop simplified representations o f the estuary physics that reproduce the tidally-averaged circulation, SSC distribution, and oxygen depletion. These models show that SSC and oxygen concentrations …
Evaluation Of Quikscat Data For Monitoring Vegetation Phenology,
2011
CUNY City College
Evaluation Of Quikscat Data For Monitoring Vegetation Phenology, Doralee Pellot
Dissertations and Theses
No abstract provided.
Towards A Better Monitoring Of Soil Moisture Using A Combination Of Estimates From Passive Of Microwave And Infrared Observations,
2011
CUNY City College
Towards A Better Monitoring Of Soil Moisture Using A Combination Of Estimates From Passive Of Microwave And Infrared Observations, Zulamet Z. Vega-Martinez
Dissertations and Theses
No abstract provided.
Validation Of Noaa Interactive Snow Maps In The North American Region With National Climatic Data Center Ground-Based Data,
2011
CUNY City College
Validation Of Noaa Interactive Snow Maps In The North American Region With National Climatic Data Center Ground-Based Data, Christine Chen
Dissertations and Theses
"Both the areal coverage of snow and the volume of water in its subsequent melt are of concern for the creation and maintenance of both hydroelectric power and local water supply. The interactive multisensor snow and ice mapping system (IMS) is a geographic interactive system that allows for both the viewing of various sensor data and the mapping daily both snow and sea ice extent by an analyst on one platform. This thesis investigates the agreement between the National Oceanic and Atmospheric Administration’s (NOAA) interactive multisensor snow and ice mapping system (IMS) and snow depth values obtained from the National …
High-Resolution Numerical Simulation Of Tidal Enegry Distribution Along The New Jersey Coastline And Influence Of Sea-Level Rise,
2011
CUNY City College
High-Resolution Numerical Simulation Of Tidal Enegry Distribution Along The New Jersey Coastline And Influence Of Sea-Level Rise, Simon Kraatz
Dissertations and Theses
No abstract provided.
Monitoring And Improving The Effectiveness Of Quality Control And Quality Assurance In Road Construction At Al-Ain Municipality,
2011
United Arab Emirates University
Monitoring And Improving The Effectiveness Of Quality Control And Quality Assurance In Road Construction At Al-Ain Municipality, Mohammed Muftah Sultan Al Aryani
Theses
A good roads network has an important bearing on the economic growth of the country. Construction of quality roads, which is considered a primary objective of any highway agencies and contractors, requires concerted efforts on many fronts. Over the past several years, agencies have been working with the construction industry to implement Quality Assurance/Quality Control activities (QA/QC) in an effort to improve the quality of highway construction. They are used as a mean to describe the materials, workmanship, and other general requirements for the project that the highway agencies expect from the contractors. Good specifications should be easy to understand …
Characterizing Liquefaction Potential Of Pleistocene Soil Deposits In The Charleston Area, South Carolina,
2011
Clemson University
Characterizing Liquefaction Potential Of Pleistocene Soil Deposits In The Charleston Area, South Carolina, Tahereh Heidari
All Dissertations
Liquefaction potential of major Pleistocene deposits in the Greater Charleston area, South Carolina is investigated in this dissertation. The data considered to characterize liquefaction potential include field performance information the 1886 Charleston earthquake and the results of many seismic cone penetration tests with pore water measurements (SCPTu). The investigation begins with the Mount Pleasant area, and then expands to the entire Greater Charleston area.
A liquefaction potential map of Mount Pleasant is created through reviewing available first-hand accounts of ground behavior during the 1886 earthquake, analyzing cone penetration test and shear wave velocity data, and correlating the results with geology. …
