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Articles 2791 - 2820 of 4954
Full-Text Articles in Engineering
Infrared Thermography-Driven Flaw Detection And Evaluation Of Hot Mix Asphalt Pavements, Yong K. Cho, Thaddaeus Bode, Yong-Rak Kim
Infrared Thermography-Driven Flaw Detection And Evaluation Of Hot Mix Asphalt Pavements, Yong K. Cho, Thaddaeus Bode, Yong-Rak Kim
Nebraska Department of Transportation: Research Reports
No abstract provided.
Guardrail Location Rating System Users Manual, Charlie Sun, Tony L. Beckham, Tommy C. Hopkins, Jerry G. Pigman, Eric R. Green, Kenneth R. Agent
Guardrail Location Rating System Users Manual, Charlie Sun, Tony L. Beckham, Tommy C. Hopkins, Jerry G. Pigman, Eric R. Green, Kenneth R. Agent
Kentucky Transportation Center Research Report
The Kentucky Transportation Cabinet’s Division of Maintenance is responsible for identifying and prioritizing locations in need of guardrail. A procedure used by the Kentucky Transportation Cabinet was originally developed by the Kentucky Transportation Center in 1989 and updated in 2002. Based on frequent usage by the Kentucky Transportation Cabinet of the guardrail location rating system database, the need was identified to update the existing database and incorporate improved reporting capabilities. The objectives of the research study, as documented herein, were to update and improve the processes for identification of roadway locations that should be considered for installation of guardrail. Primary …
Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Yong-Rak Kim, Leonardo T. Souza
Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Yong-Rak Kim, Leonardo T. Souza
Nebraska Department of Transportation: Research Reports
This research targeted two primary purposes: to estimate current aggregate angularity test methods and to evaluate current aggregate angularity requirements in the Nebraska asphalt mixture/pavement specification. To meet the first research objective, various aggregate angularity tests were estimated with the same sets of aggregates and were compared by investigating their characteristics on testing repeatability, cost, testing time, workability, and sensitivity of test results. For the second objective, the effect of aggregate angularity on mixture performance was investigated by conducting laboratory performance tests (the uniaxial static creep test and the indirect tensile fracture energy test) of five mixes designed with different …
Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Leonardo T. Souza, Yong-Rak Kim
Effects Of Aggregate Angularity On Mix Design Characteristics And Pavement Performance, Leonardo T. Souza, Yong-Rak Kim
Nebraska Department of Transportation: Research Reports
No abstract provided.
Fiscal Year 2009 Fhwa-536 Report For The Kentucky Transportation Cabinet, Steven Douglas Kreis, Candice Y. Wallace
Fiscal Year 2009 Fhwa-536 Report For The Kentucky Transportation Cabinet, Steven Douglas Kreis, Candice Y. Wallace
Kentucky Transportation Center Research Report
The Federal Highway Administration (FHWA) requires state transportation agencies to submit a biennial report on local highway finances. The purpose of these reports is to provide FHWA with the data it needs to capture the financing of highway activities at the local level. Based on this information, it can identify trends in revenue, expenditures, investments, and program development, and in turn make decisions about future investments. The report, FHWA-536, asks agencies to report on four areas of local highway finance: 1) disposition of highway-user revenues; 2) revenues used for roads and streets identified by source and funding type; 3) road …
Seismic Vulnerability Of Oregon State Highway Bridges: Mitigation Strategies To Reduce Major Mobility Risks, Albert Nako, Craig Shike, Jan Six, Bruce Johnson, Peter Dusicka, Selamawit Tesfayesus Mehary
Seismic Vulnerability Of Oregon State Highway Bridges: Mitigation Strategies To Reduce Major Mobility Risks, Albert Nako, Craig Shike, Jan Six, Bruce Johnson, Peter Dusicka, Selamawit Tesfayesus Mehary
Civil and Environmental Engineering Faculty Publications and Presentations
The Oregon Department of Transportation and Portland State University evaluated the seismic vulnerability of state highway bridges in western Oregon. The study used a computer program called REDARS2 that simulated the damage to bridges within a transportation network. It predicted ground motions for a specific location and magnitude of earthquake, resulting bridge damage and the cost of the damage, as well as the cost to the public for traffic delays due to detours around damaged bridges. Estimated damage and delay costs were presented for major highways in the region.
Moisture Sensitivity Of Hot Mix Asphalt Mixtures In Nebraska -- Phase Ii, Ingryd Pinto, Hoki Ban, Yong-Rak Kim
Moisture Sensitivity Of Hot Mix Asphalt Mixtures In Nebraska -- Phase Ii, Ingryd Pinto, Hoki Ban, Yong-Rak Kim
Nebraska Department of Transportation: Research Reports
No abstract provided.
Use Of Ground Penetrating Radar For Construction Quality Assurance O Concrete Pavement, George Morcous, Ece Erdogmus
Use Of Ground Penetrating Radar For Construction Quality Assurance O Concrete Pavement, George Morcous, Ece Erdogmus
Nebraska Department of Transportation: Research Reports
No abstract provided.
Investigation And Mitigation Of Driver Confusion At Modern Roundabouts, Aemal Khattak, Gregory Mcknight, Karen Schurr, Ram R. Bishu
Investigation And Mitigation Of Driver Confusion At Modern Roundabouts, Aemal Khattak, Gregory Mcknight, Karen Schurr, Ram R. Bishu
Nebraska Department of Transportation: Research Reports
Construction of modern roundabouts in place of traditional four-legged intersections is becoming common in the United States. Roundabout negotiation can be confusing for drivers who are not familiar with their use. This research was carried out to identify roundabout elements that play a role in incorrect roundabout negotiation, ascertain driver characteristics prominent in incorrect roundabout negotiation, assess the relative potential for incorrect negotiation amongst different groups of drivers, and suggest measures for improving drivers’ abilities to negotiate roundabouts. Potential for incorrect roundabout negotiation was measured by asking questions in a survey questionnaire related to rules of roundabout negotiation and the …
Behavior And Design Of Buried Concrete Pipes Phase Ii, Ece Erdogmus, Maher K. Tadros
Behavior And Design Of Buried Concrete Pipes Phase Ii, Ece Erdogmus, Maher K. Tadros
Nebraska Department of Transportation: Research Reports
No abstract provided.
Termination And Anchorage Of Temporary Concrete Barriers, Scott Rosenbaugh, Robert W. Bielenberg, Ronald K. Faller, John R. Rohde, Dean L. Sicking, Karla A. Lechtenberg, James C. Holloway M.S.C.E., E.I.T., John D. Reid
Termination And Anchorage Of Temporary Concrete Barriers, Scott Rosenbaugh, Robert W. Bielenberg, Ronald K. Faller, John R. Rohde, Dean L. Sicking, Karla A. Lechtenberg, James C. Holloway M.S.C.E., E.I.T., John D. Reid
Nebraska Department of Transportation: Research Reports
No abstract provided.
Performance Limits For 6-In. High Curbs Placed In Advance Of The Mgs Using Mash Vehicles Part:Ii Full-Scale Crash Testing, Karla A. Lechtenberg, Ronald K. Faller, Dean L. Sicking, Robert W. Bielenberg M.S.C.E., E.I.T., Jeffery C. Thiele, John D. Reid
Performance Limits For 6-In. High Curbs Placed In Advance Of The Mgs Using Mash Vehicles Part:Ii Full-Scale Crash Testing, Karla A. Lechtenberg, Ronald K. Faller, Dean L. Sicking, Robert W. Bielenberg M.S.C.E., E.I.T., Jeffery C. Thiele, John D. Reid
Nebraska Department of Transportation: Research Reports
No abstract provided.
Analysis Of Traffic Crash Data In Kentucky (2004 – 2008), Eric R. Green, Kenneth R. Agent, Jerry G. Pigman
Analysis Of Traffic Crash Data In Kentucky (2004 – 2008), Eric R. Green, Kenneth R. Agent, Jerry G. Pigman
Kentucky Transportation Center Research Report
This report documents an analysis of traffic crash data in Kentucky for the years of 2004 through 2008. A primary objective of this study was to determine average crash statistics for Kentucky highways. Average and critical numbers and rates of crashes were calculated for various types of highways in rural and urban areas. These data can be used in Kentucky’s procedure to identify locations that have abnormal rates or numbers of crashes.
The other primary objective of this study was to provide data that can be used in the preparation of the problem identification portion of Kentucky’s Annual Highway Safety …
Analysis And Modeling Of Motor Vehicle Crashes Involving Air Force Military Personnel, Antonios Markopoulos
Analysis And Modeling Of Motor Vehicle Crashes Involving Air Force Military Personnel, Antonios Markopoulos
Theses and Dissertations
The primary purpose of this thesis was to improve the data analysis of Motor Vehicle Crashes (MVCs). This thesis employed the Air Force Safety Center (AFSC) data, collected over 20 years, of MVCs in which US Air Force (USAF) military personnel are involved when off duty and off base. Categorical Data Analysis and Analysis of Variance (ANOVA) were applied to identify risk factors related to MVCs and influence the severity of injuries and those factors associated with the alcohol consumption before driving, and affect the number of lost workdays resulting from MVCs. Categorical Data Analysis showed that male USAF members …
Impacto Socioeconómico Generado Por La Obra Civil De Transmilenio En El Sector Comprendido Desde La Calle 72 Hasta La Calle 127 Sobre La Autopista Norte, Durley Paola Rodríguez García
Impacto Socioeconómico Generado Por La Obra Civil De Transmilenio En El Sector Comprendido Desde La Calle 72 Hasta La Calle 127 Sobre La Autopista Norte, Durley Paola Rodríguez García
Ingeniería Civil
No abstract provided.
Impacto Socioeconómico De La Obra Transmilenio, Troncal Caracas, Tramo Comprendido Desde La Calle 26 Hasta La Calle 72, Carlos Augusto Ipus Gaviria, Juan Pablo Romano
Impacto Socioeconómico De La Obra Transmilenio, Troncal Caracas, Tramo Comprendido Desde La Calle 26 Hasta La Calle 72, Carlos Augusto Ipus Gaviria, Juan Pablo Romano
Ingeniería Civil
No abstract provided.
Transportation Impacts Of Smart Growth Development In Maine, Andrew Weeks
Transportation Impacts Of Smart Growth Development In Maine, Andrew Weeks
University of Vermont Transportation Research Center
No abstract provided.
Impacto Socioeconómico Generado Por La Obra Civil De Transmilenio En El Tramo Vial Comprendido Entre La Calle 8ª Sur Y El Portal Sur, Sobre La Troncal Nqs, Heidy Trinidad Henao Culma, Ricardo Andrés Ávila Díaz
Impacto Socioeconómico Generado Por La Obra Civil De Transmilenio En El Tramo Vial Comprendido Entre La Calle 8ª Sur Y El Portal Sur, Sobre La Troncal Nqs, Heidy Trinidad Henao Culma, Ricardo Andrés Ávila Díaz
Ingeniería Civil
No abstract provided.
Developing Corridor-Level Truck Travel Time Estimates And Other Freight Performance Measures From Archived Its Data, Christopher M. Monsere, Michael Wolfe, Heba Alawakiel, Max Taylor Stephens
Developing Corridor-Level Truck Travel Time Estimates And Other Freight Performance Measures From Archived Its Data, Christopher M. Monsere, Michael Wolfe, Heba Alawakiel, Max Taylor Stephens
TREC Final Reports
The objectives of this research were to retrospectively study the feasibility for using truck transponder data to produce freight corridor performance measures (travel times) and real-time traveler information. To support this analysis, weigh-in-motion data from each of the twenty-two stations in Oregon were assembled, processed, and uploaded in the WIM data archive is housed under the Portland Transportation Archive Listing (PORTAL) umbrella at Portland State University’s Intelligent Transportation Systems Lab. Nearly 42,000,000 truck records were successful uploaded to the archive dating back to July 2005. Two separate algorithms necessary for this research were scripted, tested, and validated. The closest stations …
The North American Transportation Security Center – Fedtrak Specifications And Release Plan, Steven Douglas Kreis, Michael M. Barclay
The North American Transportation Security Center – Fedtrak Specifications And Release Plan, Steven Douglas Kreis, Michael M. Barclay
Kentucky Transportation Center Research Report
Executive Summary
In April 2008, the U.S. Transportation Security Administration (TSA) completed work on the TSA Hazmat Truck Security Pilot (HTSP). This congressionally mandated pilot program was undertaken to prove that a hazmat truck tracking center was feasible from a technology and systems perspective. The HTSP project team built a technology prototype of a hazmat truck tracking system to show that “smart truck” technology could be crafted into an effective and efficient system for tracking hazmat shipments. The HTSP project team also built the Universal Communications Interface – the XML gateway for hazmat carriers to use to provide data to …
The North American Transportation Security Center – Serri Analysis Update, Steven Douglas Kreis, Michael M. Barclay
The North American Transportation Security Center – Serri Analysis Update, Steven Douglas Kreis, Michael M. Barclay
Kentucky Transportation Center Research Report
Executive Summary
There are over 800,000 hazardous materials (hazmat) shipments over the nation’s roads each day. According to the U.S. Department of Homeland Security (DHS), terrorist activity related to the transportation of hazardous materials represents a significant threat to public safety and the nation’s critical infrastructure. Specifically, the federal government has identified the government’s inability to track hazmat shipments on a real-time basis as a significant security vulnerability.
In 2004, the U.S. Federal Motor Carrier Safety Administration (FMCSA) completed a study to determine if “smart truck” technology such as GPS tracking, wireless modems, panic buttons, and on-board computers could be …
2009 Safety Belt Usage Survey In Kentucky, Kenneth R. Agent, Eric R. Green
2009 Safety Belt Usage Survey In Kentucky, Kenneth R. Agent, Eric R. Green
Kentucky Transportation Center Research Report
The objective of this study was to establish 2009 safety belt and child safety seat usage rates in Kentucky. The 2009 survey continues to document the results after enactment of the original “secondary enforcement” statewide mandatory safety belt law in 1994 and the subsequent change to “primary enforcement” which was enacted in 2006. Data were collected at 160 randomly selected sites in 18 counties across Kentucky. Data from the individual sites were combined into a statewide percentage considering roadway functional classification, county, and vehicle miles traveled.
The data show that the usage rate in 2009 (79.7 percent) increased several percentage …
Using Geographically Weighted Regression Models To Analyze Crash Harm, Libin Zheng
Using Geographically Weighted Regression Models To Analyze Crash Harm, Libin Zheng
Civil & Environmental Engineering Theses & Dissertations
Society pays a high cost for collisions in terms of property damage, injuries and loss of life. This paper has two objectives. One is to examine various factors associated with harm caused by highway collisions. Both global OLS and local GWR models are provided to identify specific variables influencing crash harm. Another objective is to demonstrate the use of a Geographically Weighted Regression (GWR) method in this complex safety problem, which can estimate models for each crash location and show spatial variation. The results show that the GWR model is a significant improvement on the OLS model; the test for …
Best Management Practices To Exchange Information Between The Toc And District Offices, Jennifer R. Walton, Kenneth R. Agent
Best Management Practices To Exchange Information Between The Toc And District Offices, Jennifer R. Walton, Kenneth R. Agent
Kentucky Transportation Center Research Report
The objective of this study was to develop best management practices for exchange of information between the Transportation Operations Center (TOC) and the district offices and regional traffic management centers. Data collected for this study included: meetings with the Study Advisory Committee and key personnel within the Kentucky Transportation Cabinet at the central office and highway district offices; a literature review; a state website review; and telephone interviews with representatives from a few states.
Recommendations were made in the following general areas: use of CARS/511; communication between the TOC and district offices; SAFE patrol; ITS equipment; public information; incident management; …
The North American Transportation Security Center – Deploy Project Collaboration Hardware/Software Infrastructure, Steven Douglas Kreis, Michael M. Barclay
The North American Transportation Security Center – Deploy Project Collaboration Hardware/Software Infrastructure, Steven Douglas Kreis, Michael M. Barclay
Kentucky Transportation Center Research Report
No abstract provided.
Best Practices For Providing Traveler Information Services To Motorists At Rest Areas And Welcome Centers, Candice Y. Wallace, Jennifer R. Walton, Joseph D. Crabtree
Best Practices For Providing Traveler Information Services To Motorists At Rest Areas And Welcome Centers, Candice Y. Wallace, Jennifer R. Walton, Joseph D. Crabtree
Kentucky Transportation Center Research Report
The objective of this study was to look at what Kentucky and other states are doing to provide wireless Internet connectivity (i.e., Wi-Fi service) for motorists at rest areas, weigh stations, and truck rest havens, and to identify technologies and best practices that may have applicability to Kentucky. A secondary objective was to look at the use of kiosks to provide traveler information in rest areas and welcome centers. Information was gathered through a literature review, Internet searches, and telephone interviews with public officials in numerous states. The study identified 18 states that are providing (or have provided) Wi-Fi service …
Development Of Field Data For Effective Implementation Of Mechanistic Empirical Pavement Design Procedure, Atorod Azizinamini, Nima Ala, Mohammad Ajmal Stanigzai
Development Of Field Data For Effective Implementation Of Mechanistic Empirical Pavement Design Procedure, Atorod Azizinamini, Nima Ala, Mohammad Ajmal Stanigzai
Nebraska Department of Transportation: Research Reports
No abstract provided.
Freeway Speed-Flow Relationships Under Rain And Congested Conditions, Jongho Byun
Freeway Speed-Flow Relationships Under Rain And Congested Conditions, Jongho Byun
Dissertations
A procedure to account for the impact of rain and congested conditions on the average speed estimates is provided in this study. Although the Highway Capacity Manual (HCM) provides some discussion on the impact of adverse weather on speed-flow relationships, these impacts are not quantified. Using data collected under rain and congested conditions, a procedure for estimating the average speed under these conditions is provided, which is an improvement over the existing HCM (2000) procedures. Using the speed-flow relationships provided in the HCM (2000) for basic freeway segments as a starting point, new numerical relationships suitable for New Jersey roadways …
Analysis Of Marine Container Terminal Gate Congestion, Truck Waiting Cost, And System Optimization, Chang Qian Guan
Analysis Of Marine Container Terminal Gate Congestion, Truck Waiting Cost, And System Optimization, Chang Qian Guan
Dissertations
As world container volume continues to grow and the introduction of 12,000 TEUs plus containerships into major trade routes, the port industry is under pressure to deal with the ever increasing freight volume. Gate congestion at marine container terminal is considered a major issue facing truckers who come to the terminal for container pickup and delivery. Harbor truckers operate in a very competitive environment; they are paid by trip, not by the hours they drive. Gate congestion is not only detrimental to their economic well-being, but also causes environmental pollution.
This thesis applies a multi-server queuing model to analyze marine …
Highway-Railway At-Grade Crossings: Long-Term Settlement Measurements And Assessments, Jerry G. Rose, Mary G. Swiderski, Justin S. Anderson, Lindsay A. Walker
Highway-Railway At-Grade Crossings: Long-Term Settlement Measurements And Assessments, Jerry G. Rose, Mary G. Swiderski, Justin S. Anderson, Lindsay A. Walker
Kentucky Transportation Center Research Report
The purpose of this research was to evaluate the long-term settlements for a wide variety of at-grade crossings. Twenty-four highway crossings were monitored to determine the effects of enhanced support on minimizing long-term settlements of the crossing surfaces. Settlements of the rail and highway approaches to the crossing areas were compared to settlements of the common crossing areas over an average service period of three years. Long-term settlements of crossings with traditional all-granular support materials were compared to crossings with enhanced support. The enhanced support was provided by substituting a layer of asphalt (termed underlayment) for the all-granular subballast layer. …