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- Kentucky Transportation Center Research Report (25)
- Nebraska Department of Transportation: Research Reports (11)
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- Civil and Environmental Engineering and Engineering Mechanics Faculty Publications (1)
Articles 1 - 30 of 44
Full-Text Articles in Engineering
Rideability Issues For Asphalt And Concrete Specification Modifications, Brad Rister, Clark Graves
Rideability Issues For Asphalt And Concrete Specification Modifications, Brad Rister, Clark Graves
Kentucky Transportation Center Research Report
Concerns have been raised regarding the differences between the incentive/disincentive determination procedures as well as the pay adjustments for rideability between asphalt and concrete projects. This report will attempt to do the following:
- Address the differences between concrete and asphalt rideability specifications by looking at Kentucky’s historical rideability specifications and the specifications of peer states.
- Review the necessity to revise current specifications based on historical rideability data, peer states rideability specifications, technological advancements in placement of roadway materials, and technological advancements in measuring rideability after construction.
- Evaluate the monetary impact of a revised rideability specification on the latest year’s data. …
Fiscal Year 2007 Fhwa-536 Report For The Kentucky Transportation Cabinet, Steven Douglas Kreis
Fiscal Year 2007 Fhwa-536 Report For The Kentucky Transportation Cabinet, Steven Douglas Kreis
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 …
Development Of A Tl-5 Vertical Faced Concrete Median Barrier Incorporating Head Ejection Criteria, Scott Rosenbaugh, Dean L. Sicking, Ronald K. Faller
Development Of A Tl-5 Vertical Faced Concrete Median Barrier Incorporating Head Ejection Criteria, Scott Rosenbaugh, Dean L. Sicking, Ronald K. Faller
Nebraska Department of Transportation: Research Reports
No abstract provided.
Phase Iii Development Of A Short-Radius Guardrail For Intersecting Roadways, Cody S. Stolle, Karla A. Polivka, Robert W. Bielenberg, Ronald K. Faller, Dean L. Sicking, John R. Rohde, John D. Reid
Phase Iii Development Of A Short-Radius Guardrail For Intersecting Roadways, Cody S. Stolle, Karla A. Polivka, Robert W. Bielenberg, Ronald K. Faller, Dean L. Sicking, John R. Rohde, John D. Reid
Nebraska Department of Transportation: Research Reports
No abstract provided.
Evaluation Of The Role Of Driver’S Knowledge Of Who Has The Right-Of-Way Contributes To Interstate On-Ramp Crashes, Deogratias Eustace, Vamsi Krishna Indupuru
Evaluation Of The Role Of Driver’S Knowledge Of Who Has The Right-Of-Way Contributes To Interstate On-Ramp Crashes, Deogratias Eustace, Vamsi Krishna Indupuru
Civil and Environmental Engineering and Engineering Mechanics Faculty Publications
The knowledge of drivers on who has the right-of-way between the one on mainline lanes of a freeway and the one entering the freeway through on-ramp junction lane was evaluated. In addition, drivers’ opinions on how to make the on-ramp junctions safer were collected. A survey instrument with 21 items requesting drivers’ information in regard with demographics, freeway driving experience, knowledge of right-of-way and merging practices was used for data collection. The results show that crashes are relatively rare events and for some reasons, most of them never happen but result into near misses, which can not be reported and …
Resilient Modulus Of Compacted Crushed Stone Aggregate Bases, Tommy C. Hopkins, Tony L. Beckham, Charlie Sun
Resilient Modulus Of Compacted Crushed Stone Aggregate Bases, Tommy C. Hopkins, Tony L. Beckham, Charlie Sun
Kentucky Transportation Center Research Report
In recent years, the American Association of State Highway Transportation Officials (AASHTO) has recommended the use of resilient modulus for characterizing highway materials for pavement design. This recommendation evolved as result of a trend in pavement design of using mechanistic models. Although much progress has been made in recent years in developing mathematical, mechanistic pavement design models, results obtained from those models are only as good as the material parameters used in the models. Resilient modulus of aggregate bases is an important parameter in the mechanistic models. The main goal of this study was to establish a simple and efficient …
Development Of The Midwest Guardrail System (Mgs) W-Beam To Thrie Beam Transition Element, Ronald K. Faller, John R. Rohde, Robert W. Bielenberg, Karla A. Polivka, Dean L. Sicking, John D. Reid, Craig M. Eller, Erin M. Allison
Development Of The Midwest Guardrail System (Mgs) W-Beam To Thrie Beam Transition Element, Ronald K. Faller, John R. Rohde, Robert W. Bielenberg, Karla A. Polivka, Dean L. Sicking, John D. Reid, Craig M. Eller, Erin M. Allison
Nebraska Department of Transportation: Research Reports
No abstract provided.
Midwest Guardrail System For Long-Span Culvert Application, Robert W. Bielenberg, Ronald K. Faller, John R. Rohde, Dean L. Sicking, James C. Holloway, Karla A. Polivka, John D. Reid, Erin M. Allison
Midwest Guardrail System For Long-Span Culvert Application, Robert W. Bielenberg, Ronald K. Faller, John R. Rohde, Dean L. Sicking, James C. Holloway, Karla A. Polivka, John D. Reid, Erin M. Allison
Nebraska Department of Transportation: Research Reports
No abstract provided.
A Comparison Of State Policies For Complying With The Endangered Species Act, Lenahan O'Connell, Ted Grossardt
A Comparison Of State Policies For Complying With The Endangered Species Act, Lenahan O'Connell, Ted Grossardt
Kentucky Transportation Center Research Report
In recent years the number of biological assessments (BAs) for the presence of endangered species conducted by KYTC has risen significantly. This was primarily due to new/additional restrictions imposed by the United States Fish and Wildlife Service (USFWS) in 2005. The most consequential restriction was the listing of the Indiana bat as potentially present in all Kentucky counties. Previously BAs for the Indiana bat were only conducted when a project occurred in a county in which the Indiana bat had been observed (a known occurrence). This study reviewed the policies of the states adjacent to Kentucky, as well as those …
Analysis Of Traffic Crash Data In Kentucky (2002 - 2006), Eric R. Green, Kenneth R. Agent, Jerry G. Pigman
Analysis Of Traffic Crash Data In Kentucky (2002 - 2006), 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 2002 through 2006. 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 …
Evaluation Of Us 119 Pine Mountain Safety Improvements (Final Report), Jerry G. Pigman, Kenneth R. Agent
Evaluation Of Us 119 Pine Mountain Safety Improvements (Final Report), Jerry G. Pigman, Kenneth R. Agent
Kentucky Transportation Center Research Report
The Transportation Center at the University of Kentucky was requested to perform an evaluation of the safety improvement project over a 7.1-mile section of US 119 on the Whitesburg side of Pine Mountain in Letcher County to determine whether the types of improvements undertaken affected the overall safety of the roadway. Specific attention was given to the effects of a ban on truck traffic that was implemented in March 2001. In addition, there was a need to determine if the use of flexible design was successful after removal of the truck restriction by permitting trucks with dimensions up to the …
Developing A Byproduct Materials Information Systems For The Kentucky Transportation Cabinet, David Q. Hunsucker, Justin Jones, Tom Hopkins, Charlie Sun
Developing A Byproduct Materials Information Systems For The Kentucky Transportation Cabinet, David Q. Hunsucker, Justin Jones, Tom Hopkins, Charlie Sun
Kentucky Transportation Center Research Report
Kentucky has numerous coal-fired, electric generating facilities and, as a result, there are abundant byproduct materials being produced from these facilities that have environmental, engineering, and economic potential as materials for use in common highway construction and maintenance related activities throughout the Commonwealth. Other byproduct materials are being produced and are available that may have potential uses as well. Although large quantities of byproduct materials are produced in Kentucky and many of those materials have positive or neutral environmental impacts and excellent engineering properties, a formal regulatory framework for selecting, characterizing, recovering, and recycling these material types does not exist. …
Analysis Of Procurement Processes And Development Of Recommendations For Intelligent Transportation Systems (Its) Procurements, Joseph D. Crabtree, Christopher W. Frost, Jennifer Walton, John Crossfield
Analysis Of Procurement Processes And Development Of Recommendations For Intelligent Transportation Systems (Its) Procurements, Joseph D. Crabtree, Christopher W. Frost, Jennifer Walton, John Crossfield
Kentucky Transportation Center Research Report
Traditional state procurement processes are not well-suited to the procurement of Intelligent Transportation Systems (ITS). The objective of this study was to analyze Kentucky’s existing procurement processes, identify strengths and weaknesses of each, and develop recommendations for a revised process (or processes) that would meet the unique requirements of ITS procurements. Four existing processes were identified, studied, documented, and assessed. The study also looked at design-build processes, both in Kentucky and in other states. Recommendations were developed for statutory changes to improve Kentucky’s ability to procure ITS technologies and systems.
2007 Safety Belt Usage Survey In Kentucky, Kenneth R. Agent, Eric R. Green
2007 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 2007 safety belt and child safety seat usage rates in Kentucky. The 2007 survey continues to document the results after enactment of the original “secondary enforcement” statewide mandatory safety belt law in 1994 and the change to “primary enforcement” which was enacted in 2006. Data were collected at 200 randomly selected sites spread across Kentucky. Data from the individual sites were combined into a statewide percentage considering roadway functional classification, geographic region, and vehicle miles traveled. The data show that the usage rate in 2007 (71.8 percent) increased several percentage points compared …
Evaluation Of Kentucky’S “Buckle Up Kentucky: It’S The Law & It’S Enforced” 2007 Campaign, Kenneth R. Agent, Eric R. Green, Ronald E. Langley
Evaluation Of Kentucky’S “Buckle Up Kentucky: It’S The Law & It’S Enforced” 2007 Campaign, Kenneth R. Agent, Eric R. Green, Ronald E. Langley
Kentucky Transportation Center Research Report
The objective of this report was to document the results of the “Buckle Up Kentucky: It’s the Law & It’s Enforced” 2007 campaign in Kentucky. Data were also taken to document the change in usage after enactment of the primary enforcement law. The campaign involved a combination of earned media, paid media, and enforcement. The earned media started about five weeks prior to Memorial Day 2007 and continued through the enforcement periods. The paid media campaign was for the two weeks prior to Memorial Day while the enforcement period was a two-week period including the week before and the week …
Streambank Stabilization Using Traditional And Bioengineering Methods:A Literature Review, David M. Admiraal
Streambank Stabilization Using Traditional And Bioengineering Methods:A Literature Review, David M. Admiraal
Nebraska Department of Transportation: Research Reports
No abstract provided.
Improving Arterial Performance Measurement Using Traffic Signal System Data, Michael Wolfe, Christopher Monsere, Peter Koonce, Robert L. Bertini
Improving Arterial Performance Measurement Using Traffic Signal System Data, Michael Wolfe, Christopher Monsere, Peter Koonce, Robert L. Bertini
Civil and Environmental Engineering Faculty Publications and Presentations
The characterization of the performance of freeways in real time and on a historical basis has been successfully achieved for many years. The ability to characterize arterial performance has been more elusive. Currently numerous applications of traffic management and traveler information systems include freeways but lack the ability to extend their operation to major arterials. This paper describes methods for quantifying arterial performance using data from signal system loop detectors. Included in the array of metrics are traffic density, total delay, predicted travel time, and signal coordination effectiveness. Methods for determining performance in these areas are adapted for use in …
Context Sensitive Solutions For Construction And Maintenance, Theodore Hopwood Ii, Donald L. Hartman, Jerry G. Pigman
Context Sensitive Solutions For Construction And Maintenance, Theodore Hopwood Ii, Donald L. Hartman, Jerry G. Pigman
Kentucky Transportation Center Research Report
The objective of this research was to conduct a survey to assess the state of practice related to state highway agencies (SHAs) implementing context sensitive solutions including its application in Construction and Maintenance and to prepare a workshop enabling SHA officials to adopt practices promoting context sensitivity beyond Planning and Design.
Deliverables from the study efforts include a survey summary of context sensitive solutions and workshop materials/presentation suitable for use in training a wide range of SHA personnel working in Construction and Maintenance.
Blowout Penstemon (Penstemon Haydenil) Endangered Species, James Stubbendieck, Kay Lynn Kottas
Blowout Penstemon (Penstemon Haydenil) Endangered Species, James Stubbendieck, Kay Lynn Kottas
Nebraska Department of Transportation: Research Reports
No abstract provided.
Internet Enabled Remote Driving Of A Combat Hybrid Electric Power System For Duty Cycle Measurement, Jarrett Goodell, Marc Compere, Wilford Smith, Mark Brudnak, Mike Pozolo, Et Al.
Internet Enabled Remote Driving Of A Combat Hybrid Electric Power System For Duty Cycle Measurement, Jarrett Goodell, Marc Compere, Wilford Smith, Mark Brudnak, Mike Pozolo, Et Al.
Publications
This paper describes a human-in-the-loop motion-based simulator interfaced to hybrid-electric power system hardware, both of which were used to measure the duty cycle of a combat vehicle in a virtual simulation environment. The project discussed is a greatly expanded follow-on to the experiment published in [1,7]. This paper is written in the context of [1,7] and therefore highlights the enhancements. The most prominent of these enhancements is the integration (in real-time) of the Power & Energy System Integration Lab (P&E SIL) with a motion base simulator by means of a “long haul” connection over the Internet (a geographical distance of …
Evaluating And Adaptive Signal Control System In Gresham, James M. Peters, Jay Mccoy, Robert L. Bertini
Evaluating And Adaptive Signal Control System In Gresham, James M. Peters, Jay Mccoy, Robert L. Bertini
Civil and Environmental Engineering Faculty Publications and Presentations
Cities and Counties are faced with increasing traffic congestion due to rapidly increasing population. Like many agencies, the City of Gresham has struggled with how to manage the increasing congestion with limited funds for major roadway widening projects. Gresham has recognized the need to optimize existing system capacity to get the most out of their current transportation system infrastructure investment.
In 2005, the City of Gresham, in cooperation with numerous agencies in the Portland metropolitan area, evaluated a variety of signal control systems including traditional time-of-day coordination, traffic responsive, and adaptive signal control systems. Based on that evaluation, the steering …
Improve Safety Of Workers During Highway Construction And Maintenance, Donn E. Hancher, Kenneth Bussey, Robin Meagher, Jonathan Ross, Kristin Smith
Improve Safety Of Workers During Highway Construction And Maintenance, Donn E. Hancher, Kenneth Bussey, Robin Meagher, Jonathan Ross, Kristin Smith
Kentucky Transportation Center Research Report
There is an inherent risk of injury or fatality in all occupations. Even secretarial occupations face jobsite hazards such as carpal tunnel and back injury. The nature of the construction industry combined with the required physical demand and rigorous work processes, make it an industry with higher risk of injury or fatality. In an effort to decrease that inbuilt jobsite risk that construction workers face, this study will analyze the current best safety practices, examine new safety technologies, and collaborate with construction workers themselves to gain a better perspective of what jobsite hazards they face.
Specifically, this study will focus …
Recycling Practices For Environmental Materials, Sudhir Palle, Steve Higgins, Theodore Hopwood Ii
Recycling Practices For Environmental Materials, Sudhir Palle, Steve Higgins, Theodore Hopwood Ii
Kentucky Transportation Center Research Report
Two environmental materials, tree and brush debris and large animal roadkill carcasses were investigated. The disposal methods for these materials were reviewed as opportunities/methods for possible recycling. KYTC established several pilot composting operations in 2006. These were monitored during their preliminary stages of operation.
Retrofit Of The Louisa-Fort Gay Bridge Using Cfrp Laminates, Ching Chiaw Choo, Tong Zhao, Issam E. Harik
Retrofit Of The Louisa-Fort Gay Bridge Using Cfrp Laminates, Ching Chiaw Choo, Tong Zhao, Issam E. Harik
Kentucky Transportation Center Research Report
This report details the processes pertaining to the repair and strengthening of the Louisa-Fort Gay Bridge, Lawrence County, KY, using advanced composite materials. Site inspections revealed flexural cracks in the reinforced concrete girders of the continuous bridge structure. To determine the cause of these cracks, an evaluation was initiated based on vehicle classification and truck weight data. The results confirmed that certain reinforced concrete girders were stressed beyond the limits allowed by the AASHTO Code. A retrofit scheme using carbon fiber reinforced polymer (CFRP) composite was devised and the amount of CFRP laminates needed for flexural strengthening was determined from …
Stockpiling Hydrated Lime-Soil Mixtures, Tommy C. Hopkins, Tony L. Beckham, Charlie Sun
Stockpiling Hydrated Lime-Soil Mixtures, Tommy C. Hopkins, Tony L. Beckham, Charlie Sun
Kentucky Transportation Center Research Report
The concept and feasibility of stockpiling and reusing hydrated lime-soil mixtures to stabilize particular areas on stabilization projects after the mixing contractor has departed were examined. In chemical stabilization of subgrades, situations often arise where additional areas need to be stabilized after the specialty contractor and mixing equipment have left the project. Field and laboratory investigations were performed to determine if a soil mixed with hydrated lime during routine lime subgrade stabilization could be mixed, stockpiled, and used later. In laboratory studies, hydrated lime-soil mixtures were stockpiled loosely in the laboratory. CBR specimens of the stockpile material were remolded and …
Use Of Reflective Armbands To Improve Adolescent Pedestrian And Pedalcyclist Safety, Nancy Dunaway, Eric R. Green, Jerry G. Pigman, Monica L. Barrett
Use Of Reflective Armbands To Improve Adolescent Pedestrian And Pedalcyclist Safety, Nancy Dunaway, Eric R. Green, Jerry G. Pigman, Monica L. Barrett
Kentucky Transportation Center Research Report
The objective of this effort was to determine if elementary and middle school students could be educated to use reflective armbands to increase their visibility to motorists while walking or bicycling to school. The number of armbands and surveys distributed totaled slightly over 7,000. Responses were received from approximately 12 percent (873) of the pre-surveys and slightly over 3 percent (119) of the post-surveys. Respondents to the survey indicated nearly 15 percent of schoolchildren receiving reflective armbands were wearing the armband “every day” or “most days”. Of the parents responding, 21 percent indicated their children would continue to wear the …
Compaction Of Mixtures Of Hard Rocks And Soft Shales And Non-Durable Shales Using Impact Compactors, Tommy C. Hopkins
Compaction Of Mixtures Of Hard Rocks And Soft Shales And Non-Durable Shales Using Impact Compactors, Tommy C. Hopkins
Kentucky Transportation Center Research Report
Impact roller compaction has been used to improve embankment and highway subgrades in South Africa, Australia, Europe, and China and other areas of the world. In September of 2003, the International Technology Scanning Program, sponsored by the Federal Highway Administration (FHWA), the American Association of State Highway and Transportation Officials (AASHTO), and the National Cooperative Highway Research Program of the Transportation Research Board, identified this technology as one of several foreign technologies and innovations that could significantly benefit U.S. transportation systems. The technology was high-lighted at the Fifth International Conference on the Bearing Capacity of Roads and Airfields in 1998 …
Prevention Of Voc Releases From Bridge Painting Operations, Theodore Hopwood Ii, Rick Younce, Sudhir Palle
Prevention Of Voc Releases From Bridge Painting Operations, Theodore Hopwood Ii, Rick Younce, Sudhir Palle
Kentucky Transportation Center Research Report
Bridge maintenance painting employs solvent-based coatings that generate volatile organic compounds (VOCs) that contribute to air-quality problems. Methods for capturing VOCs during normal Kentucky Transportation Cabinet (KYTC) maintenance painting operations were investigated. One method, activated carbon adsorption, is adaptable to KYTC operations. Related factors including area of bridge, coating systems, containment volumes and VOC out gassing rates were reviewed. A commercial source of activated carbon adsorption equipment was identified and issues related to employing that technology for bridge painting were identified.
Voices Of Vermonters: Vermont's Transportation Future, Richard Watts, Erica Campbell
Voices Of Vermonters: Vermont's Transportation Future, Richard Watts, Erica Campbell
University of Vermont Transportation Research Center
No abstract provided.
Dry Stone Masonry Culvert Restoration, Rick Younce, Theodore Hopwood Ii, Jane M. Wooley, Neil Rippingale
Dry Stone Masonry Culvert Restoration, Rick Younce, Theodore Hopwood Ii, Jane M. Wooley, Neil Rippingale
Kentucky Transportation Center Research Report
A damaged dry stone masonry culvert on KY 1268 Jessamine County was restored by the Kentucky Transportation Cabinet. The work was performed by the Dry Stone Conservancy, a non-profit agency promoting dry stone masonry. The work included replacement of a retaining wall and widening of the culvert. The project also included a partnering effort to improve the skills of local stone masons.