973 Works

Chronic Hemodialysis in a Patient with Left Ventricular Assist Device

Amr Idris, Georges Lolay, Ana L. Castellanos, Navin Rajagopalan & Maya Guglin
Renal dysfunction in the setting of heart failure is a common medical problem. This dysfunction can range from reversible ischemic changes to renal failure requiring renal replacement therapy. Patients who are candidates for mechanical circulatory support with left ventricular assistant device (LVAD) pose unique challenge with respect to receiving dialysis. We present a 47 year old patient who required renal replacement therapy peri-implantation of LVAD for management of acute on chronic kidney disease, and was...

Workforce Assessment of the Inland Waterways Industry

Lenahan O'Connell & Timothy J. Brock
This report describes the findings of a preliminary review of the workforce needs of the inland waterways industry, which currently confronts a human resources crisis and must recruit more people who can work their way up to the skilled positions on towboats. The looming surge in retirements will present a significant hurdle—especially as its large cohort of baby boom river pilots and captains reach retirement age. The industry will need to recruit, train, and retain...

Development of Concrete QC/QA Specifications for Highway Construction in Kentucky

Kamyar C. Mahboub & Donn E. Hancher
There is a growing trend toward quality-based specifications in highway construction. A large number of quality control/quality assurance (QC/QA) specifications shift the responsibility of day-to-day testing from the state DOH to the contractor. This requirement for contractor-performed quality control testing has been partly due to the fact that state agencies are operating with a smaller pool of employees compared to previous years. Another driving force has been the application of performance-based specifications and realization that...

Countermeasures for Fatal Crashes on Two-Lane Rural Roads

Kenneth R. Agent, Jerry G. Pigman & Nikiforos Stamatiadis
In the first phase of this study, characteristics of crashes on two-lane rural roads were summarized and compared to all crashes. Also, one-mile sections having high crash rates were identified. In this phase of the study, a detailed analysis was conducted for a random sample of 150 fatal crashes which occurred on a two-lane rural road. Recommendations were made for countermeasures to reduce the number and severity of crashes on this type of roadway. The...

Contractor Performed Quality Control on KyTC Projects

Donn E. Hancher, Yuhong Wang & Kamyar C. Mahboub
This report addresses issues related to transferring the responsibility for quality control from the Kentucky Transportation Cabinet (KyTC) to construction contractors. Surveys of the KyTC, other state departments of transportation, and Kentucky highway contractors were done to identify the advantages, concerns, and modifications of the Contractor Performed Quality Control (CPQC) program. An advisory committee of experienced KyTC engineers, FHWA representatives, and contractor representatives met periodically to identify approaches for handling key issues of the program....

Toward Enhancing Estimates of Kentucky’s Heavy Truck Tax Liabilities

Andrew V. McNeill, Suzanne Perkins & Merl Hackbart
Kentucky has established a Road Fund tax structure that is partially based on the principle that the system users pay their fair share of the costs associated with maintaining a safe and efficient highway system in Kentucky. Several of the most important sources of Kentucky’s road fund revenues derived from commercial trucking are dependent on the self-reported tax liabilities submitted by trucking firms. Self- reporting and the interstate nature of this industry allows for the...

Safety Evaluation of New Roads

Kenneth R. Agent & Jerry G. Pigman
The primary objective of this research study was to evaluate the crash history of bypass routes to determine if there were unusual patterns or changes in the crash history on these routes over the first years of operation. The focus of the evaluation was to collect data at bypass routes opened in recent years in Kentucky. Crash patterns were summarized with recommendations made for countermeasures to reduce the probability of crashes, specifically at intersections, with...

Safety Implications from Design Exceptions

Kenneth R. Agent, Jerry G. Pigman & Nikiforos Stamatiadis
The objectives of this study were to: a) summarize past design exceptions to document their frequency and reason for their use and b) determine if any adverse safety implications can be related to adopting design policies and practices related to design exceptions. The design exception file maintained by the Kentucky Transportation Cabinet was obtained with data obtained relating to the types of project, exceptions requested, and the reasons for the various exceptions. A site visit...

Flexural Behavior of R/C Beams Strengthened with CFRP Sheets or Fabric

P. Alagusundaramoorthy, Issam E. Harik & Ching Chiaw Choo
The resistance to electro-chemical corrosion, high-strength to weight ratio, larger creep strain, fatigue resistance, non-magnetic and non-metallic properties of carbon fiber reinforced polymer (CFRP) composites offer a viable alternative to bonding of steel plates in repair and rehabilitation of reinforced concrete structures. The objective of this investigation is to study the effectiveness of externally bonded CFRP sheets or fabric in increasing the flexural strength of concrete beams. Four-point bending flexural tests are conducted up to...

Movements and Settlements of Highway Bridge Approaches

Bernadette Dupont & David L. Allen
This report is a discussion of the bridge approach settlement or movement problem that is so prevalent in the United States. An explanation and/or description is given of the causes of these movements as described in the literature. A discussion concerning the cost to highway agencies is also given. A review and discussion of current practices in the country is given . This includes construction practices on approach embankment foundations, the approach embankment itself, various...

Sampling Techniques for the Collection of Vehicle Classification Data

Jerry G. Pigman
The question of what length of time is necessary to collect statistically reliable vehicle classification data is an important issue when manpower is limited. Varying local conditions may necessitate more classification data be collected at some locations than others. The use of short-term counts could produce significant savings. Supplementing manual counts with automatic classification equipment could reduce data collection costs and improve accuracy. The objectives of this study were to review literature to determine the...

Implementation of Remote Sensing Technology on the I-64 Bridge over US60

Issam E. Harik, Ching Chiaw Choo, Abheetha Peiris & Dan Eaton
Remote sensing devices have been implemented on the I-64 Bridges over US60 in Franklin County, KY. One of the girders in the westbound bridge has been previously repaired due to unexpected fatigue cracking. The exterior girder in the eastbound bridge has shown signs of impacts due to the traversing trucks on US60. Sensing and recording devices such as strain and temperature gauges, infrared sensors, ultrasonic height detectors, and an accelerometer have been installed. Specifically, eleven...

Analysis Of Traffic Accident Data In Kentucky

Kenneth R. Agent & Jerry G. Pigman
This report includes an analysis of traffic accident data in Kentucky for the years of 1992 through 1996. A primary objective of this study was to determine average accident statistics for Kentucky highways. Average and critical numbers and rates of accidents 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 accidents. The other primary...

Evaluation of the ET2000 Guardrail End Treatment

Kenneth R. Agent, Jerry G. Pigman, Darrell McAlister & Tim Gatewood
The objectives of this study were to monitor and report the performance of the ET2000 guardrail end treatment design in traffic accidents. Data for a total of 34 collisions involving the ET2000 were identified. In most cases, an accident report was obtained and the damaged guardrail was inspected. The involved vehicle was inspected when available. Proper or improper performance of end treatments in the collisions were judged based on whether it performed as designed. Field...

Evaluation of Speed Limits in Kentucky

Kenneth R. Agent, Jerry G. Pigman & Joel Weber
The objectives of this study were to examine current criteria and procedures used for setting speed limits on public roads and to recommend appropriate maximum speed limits for various types of roads. The study involved three major areas. These were: review of literature, collection and analysis of speed data, and collection and analysis of accident data. The speed data included collecting data on various highway types using the “moving” radar mode, use of data from...

Stabilization of an Airport Subgrade using Hydrated Lime and Fly Ash

Tony L. Beckham & Tommy C. Hopkins
A 457-m (1,500-ft) runway pavement extension is planned for the Georgetown-Scott County Airport (Marshall Field). The clay subgrade of the existing paved runway was stabilized with six percent (dry weight) hydrated lime. A request was made by the Kentucky Transportation Cabinet, Division of Aeronautics, to determine the feasibility of replacing a percentage of the hydrated lime stabilizer with fly ash for the extended runway subgrade. Kentucky Highway Investigative Task No. 27 was issued by the...

Performance and Cost Effectiveness of Pavement Edge Drains

L. John Fleckenstein & David L. Allen
It is apparent from research conducted under this study that edge drains increase subgrade strength through the removal of water. It is also apparent in most cases that the edge drains increase pavement life by approximately seven years. Current cost benefit analysis indicates that edge drains can provide a cost savings of approximately $200,000 dollars a mile over the life of the pavement. Research also indicates that if edge drains are not properly installed and...

Development of a Critical Path Method Specification and a Training Program for use of CPM for KyTC

Donn E. Hancher, Raymond F. Werkmeister & Sion L. Tesone
The Critical Path Method scheduling technique is outlined as it applies to KYTC projects. Special Provision 82 (94) and its requirements are outlined.

Traffic Forecasting Report – 2007

David Hamilton
This is the sixth edition of the Traffic Forecasting Report (TFR). This edition of the TFR contains the latest (predominantly 2007) forecasting/modeling data as follows: Functional class average traffic volume growth rates and trends Vehicle miles traveled statewide total by functional class ATR locations, K-factors, and ADTs Functional class average K-factors and D-factors Functional class average truck volumes, truck percentages, ESAL calculation factors, and vehicle types Kentucky Statewide Model Summary List of MPO (urbanized) and...

Seismic Evaluation and Ranking of Embankments for Bridges on and over the Parkways in Western Kentucky

Han Shan Ding, Issam E. Harik & Ching Chiaw Choo
This study represents one of the Seismic Evaluation of Bridges on and over the Parkways in Western Kentucky investigative series. The effort is focused on the seismic vulnerability of bridge embankments against slope instability and liquefaction potential. An evaluation and rating procedure is presented to assist in identifying and prioritizing bridge embankments that are susceptible to failure due to projected seismic events. To expedite the process, the algorithm titled Seismic Assessment System for Bridges (SASB)...

Truck Route Access Evaluation

Kenneth R. Agent, Brian Aldridge, Lisa Aultman-Hall, David Cain, Nikiforos Stamatiadis & Joel M. Weber
The Freight Movement and Intermodal Access in Kentucky Study (SPR 98-189) is being conducted by the Kentucky Transportation Center on behalf of the Kentucky Transportation Cabinet (KYTC). There are two major objectives of the study: evaluation of the access for trucks between intermodal or other truck generating sites and the National Highway System (NHS); and furthering the understanding of freight commodity flows throughout the state. This report summarizes the access evaluation for several facilities located...

Assessment And Modeling Of Stream Mitigation Procedures

Bobby W. Meade, Bernadette Dupont, Sudhir Palle & Theodore Hopwood
This study evaluates the construction and performance of KyDOH stream disturbance mitigation projects. The initial study tasks were to conduct a literature search, review of stream performance models, a review of Kentucky's and other agency's regulations pertaining to stream mitigation, identification of representative stream mitigation projects, and evaluation of those sites. Th results of this study will produce a tool for evaluating stream mitigation projects after they are constructed.

Revision of the Rainfall Intensity Duration Curves for the Commonwealth of Kentucky

Bernadette S. Dupont & David L. Allen
The purpose of this study was to revise and update the existing Rainfall Intensity- Duration-Frequency (IDF) Curves for the Commonwealth of Kentucky. The nine curves that currently govern Kentucky are based on data from First-Order Weather Stations in and around Kentucky. However, the new curves only utilize data from within the State. The data was gathered from both First Order and Co-operative Weather Stations. In accordance with Bulletin 71, the new curves reflect the climatological...

Evaluation Of Corrugated Steel Pipe Culverts KY 55, Shelby County

L. John Fleckenstein & David L. Allen
In February of 1998, the Kentucky Transportation Cabinet requested that the Kentucky Transportation Center investigate excessive deflection occurring in three aluminized Type 2 corrugated metal pipe culverts installed during the realigning and widening on KY 55. The pipes were initially inspected in February 1998. The embankments were only 50 percent completed and in several locations only one-half of the total length of the culvert had been installed, The scope of this project was increased after...

2012 Driver Attitudes and Awareness Survey

Kenneth R. Agent, Eric R. Green & Ronald E. Langley
A basic set of questions were developed that could be used in periodic surveys that track drivers attitudes and awareness concerning impaired driving, seat belt use, and speeding issues. The objective of the survey was to learn the knowledge, views, and behaviors of drivers in these areas. This report documents the results of the 2012 survey with comparison to the 2011 survey as well as the 2010 baseline survey.

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  • 2015
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