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Determination Of Rutting In Asphaltic Concrete Pavements: Field Instrumentation And Laboratory Characterizations, David L. Allen

Kentucky Transportation Center Research Report

This report describes a number of gages developed to measure the location and magnitude of ruts. These were installed in a newly constructed asphaltic concrete pavement. They measure lateral deflections and transient and permanent vertical deflections. Some preliminary vertical deflections are reported. An investigation of materials is also reported. The asphalt concrete base, dense-graded aggregate base, and subgrade material were characterized by (1) shear strength (triaxial tests), (2) rheologic behavior (creep tests), (3) permanent deformation characteristics (repeated-load and creep tests), (4) Young's modulus (resonant column tests), and (5) resilient properties (repeated-load tests). Empirical functions were formulated to describe the permanent …

Characteristics Of Bicycle-Related, Motor Vehicle Accidents In Kentucky, Kenneth R. Agent, Charles V. Zegeer

Kentucky Transportation Center Research Report

The purpose of this study was to determine the characteristics associated with bicycle-related, motor vehicle accidents. Bicycle-related, motor vehicle accidents in Kentucky were analyzed.

A sample of injury-producing bicycle accidents was also analyzed. It was found that cyclists 10 to 14 years of age were involved in the largest number of motor vehicle related accidents. Males were involved in four times as many accidents as females. Most accidents occurred in urban areas, mostly on residential streets. The majority of accidents resulted from errors by the cyclists. The most common type was the right-angle accident, but the leading types varied with …

Seasonal Variations In The Skid Resistance Of Pavements In Kentucky, James L. Burchett

Kentucky Transportation Center Research Report

Frequent measurements of skid resistance were made on 20 pavements in common use in Kentucky. Tests were conducted from November 1969 through 1973. Principal analysis involved relating changes in skid resistance to day of the year and relating skid resistance to temperature at the time of test, to average antecedent temperatures, and to average rainfall.

Seasonal variations exhibited an annual, sinusoidal cycle. The changes in sand-asphalt and bituminous concrete under higher volumes of traffic were about 12 skid numbers. The changes in portland cement concrete and bituminous concrete under lower volumes of traffic were about 5 skid numbers. The lowest …

Organized Resistance To An Imposed Environmental Change: A Resevoir In Eastern Kentucky, William F. Schweri Ii, John Van Willigen

KWRRI Research Reports

This is a case study of a group organized to resist the construction of an Army Corps of Engineers reservoir project located in Eastern Kentucky, More specifically the account describes how a group of landowners organized themselves and enacted an increasingly complex strategy of resistance. Within this framework perceived costs, leadership and authority and group organization are considered.

The primary method employed in this research was that of repeated interviews with members of the resistance organization who were identified as key informants. These interviews were carried out on both structured and unstructured bases.

The formal analysis of the voluntary association …

Removal Of Chloroform From Drinking Water, John S. Zogorski, George D. Allgeier, Robert Lee Mullins Jr.

KWRRI Research Reports

The overall objective of this investigation was to evaluate via laboratory experiments the technical feasibility of reducing trihalomethane levels in drinking water. Special attention was directed at the removal of chloroform since: (a) it is the only trihalomethane which has been shown to be carcinogenic in animal tests; and (b) this compound generally comprises the largest fraction of the total trihalomethane content of chlorinated waters in Kentucky. Trihalomethanes are present in municipal drinking waters due to the reaction of free chlorine with naturally occurring compounds, collectively called "precursors".

A variety of treatment processes and potential modifications (or additions) to existing …

College Of Law Commencement Program, 1978, University Of Kentucky

Graduation Programs

No abstract provided.

Acoustic Emission And Fatigue Characteristics Of Typical Bridge Steels, Theodore Hopwood Ii, James H. Havens

Kentucky Transportation Center Research Report

Acoustic emission monitoring was used during tensile tests of low-carbon structural steels to determine the physical characteristics of the acoustic emission phenomena. Results indicate that acoustic emissions are caused by micro-plastic deformation processes (i.e., dislocation motion).

A series of axial-fatigue tests was performed on several types of structural steels, some of which had extensive service in bridges. There was no apparent relation between specimen load histories and subsequent performance in fatigue tests. Tensile tests of specimens subjected to extensive fatigue testing, at stresses below the yield strength of the material, revealed no major difference in mechanical properties or acoustic emission …

Green-Extension Systems At High-Speed Intersections [Apr. 1978], Charles V. Zegeer, Robert C. Deen

Kentucky Transportation Center Research Report

The purpose of this study was to determine the effectiveness of green-extension systems (GES) for reducing the dilemma-zone problem associated with the amber phase of traffic signals at high-speed intersections. Reactions of 2,100 drivers were noted during the amber phase at nine Intersections, and the dilemma-zone distances with respect to the stop bar were determined.

Design Of A Reliable, Inexpensive Recording Rain Gage Which Utilizes Solid-State Memory, Stephen A. Dyer

KWRRI Research Reports

Researchers working in the general area of water resources frequently have need for precipitation data. Unfortunately, the cost of commercially available recording rain gages is often greater than $1,000 per unit. This report describes a microprocessor-controlled remote recording rain gage which is capable of unattended operation for periods of greater than a month that costs less than $400 in single quantities. The laboratory prototype uses a tipping bucket to collect precipitation in 0.01-inch increments. The time of the bucket tip is stored, using an offset binary format, in solid-state memory. A complete description of the gage hardware is presented along …

Heating Bridge Decks By Electrical Resistance, James H. Havens, Wm. Vernon Azevedo, Assaf S. Rahal, Robert C. Deen

Kentucky Transportation Center Research Report

The 9th-Street interchange was designed and constructed with an automated electrical heating system for snow and ice removal. This report describes the heating system, its construction, and initial operation. The heating system was capable of keeping the interchange free of ice and snow accumulation. The average daily slab temperature fell below 0°C (32°F) on only one occasion. The average cost of electrical power for heating the interchange was $1,075 per day.

Development Of Procedures For Preparation Of The Interstate Safety Improvement Program, Jerry G. Pigman, Kenneth R. Agent, Charles V. Zegeer

Kentucky Transportation Center Research Report

This report summarizes background information and presents the development of procedures for preparing and updating the lnterstate Safety Improvement Program. There are two major sections: (1) development of procedures for identifying safety needs and (2) development of procedures for prioritizing safety needs. Related to the identification of needs are eleven subsections which are based on historical data, inventories of existing facilities, and analysis of current data. Several accident surveillance procedures were used to identify sites, sections, and elements of the roadway which warrant improvements. Procedures for prioritizing safety needs are based on summaries of data from two reports by the …

Simulation Of External-Internal And Through Trips For Small Urban Areas, Jerry G. Pigman

Kentucky Transportation Center Research Report

The objective of this study was to develop models which would simulate internal-external trips and external-external (through) trips. Regression analysis and cross-classification of data were tested in an attempt to predict the number of internal-external trips and the percentage of through trips. Regression analysis was used in the development of a through-trip distribution model. Grouping data for analysis created some problems; however, trial-and-error evaluation enabled selection of variables which produced reasonable results. Variables found to be most significant in the development of internal-external models were population and employment. For through-trip models, variables used were population, functional classification, AADT at the …

Heating The 9th Street Interchange: Construction And Initial Operation, Wm. Vernon Azevedo, Assaf S. Rahal, James H. Havens

Kentucky Transportation Center Research Report

The 9th-Street interchange was designed and constructed with an automated, electrical heating system for snow and fee removal. This report describes the heating system, its construction, and initial operation. The heating system was capable of keeping the interchange free of ice and snow accumulation. The average daily slab temperature fell below 32°F (0°C) on only one occasion. The average cost of electrical power for heating the interchange was $905 per day.

The Response Of Various Soil Strength Indices To Changing Water Content And Bulk Density, Larry G. Wells, O. Treesuwan

Biosystems and Agricultural Engineering Faculty Publications

Various soil strength parameters were measured in the laboratory using a bevameter and a recording soil cone penetrometer. Measurements were made at various levels of soil bulk density and water content. Results were discussed in terms of similar published analyses. Two dissimilar methods of predicting vehicular tractive performance were compared and evaluated in terms of potential utility with respect to prediction of soil trafficability.

Predicted And Measured Drainable Porosities For Field Soils, R. W. Skaggs, Larry G. Wells, S. R. Ghate

Biosystems and Agricultural Engineering Faculty Publications

Experiments were conducted on large field cores to determine the relationship between drainage volume and water table depth for five soils. The measured drainage volumes were less than predicted from the soil water characteristics for three soils, but were in good agreement for the other two. Drainable porosities were calculated from both theoretical and experimental drainage volume-water table depth relationships by assuming that the unsaturated zone is essentially 'drained to equilibrium, with the water table. The experimental drainable porosities thus obtained were less than predicted.

Drainable porosities for drainage in two-dimensions were calculated from experimental results for one-dimension by assuming …

Bulletin Of The University Of Kentucky College Of Law – 1978-1979, University Of Kentucky College Of Law

College of Law Bulletins

The Bulletin of the University of Kentucky College of Law served numerous purposes, including: a course catalog, a roster of students, a roster of professors, an academic calendar, a listing of special events and lectures, academic policies, admission requirements, graduation requirements, and various other policies and benefits governing student life.

Water Use Permits In A Riparian State: Problems And Proposals, Richard C. Ausness

Law Faculty Scholarly Articles

Although adequate supplies of water are generally available in Kentucky, the law governing its use and allocation is much less satisfactory. At present, Kentucky water law is a complex mixture of common law and statutory water rights. The purpose of this article is to evaluate these water rights and suggest a number of improvements. Part I will examine the common law rules as they relate to both surface water and ground water. Part II will focus upon Kentucky's present system of statutory water use regulation and will identify some of its more serious deficiencies. Part III will recommend some short-range …

Characteristics Of Kentucky Drivers, Kenneth R. Agent

Kentucky Transportation Center Research Report

The characteristics of the driver population in Kentucky were examined and related to their driving record. Also, the characteristics of high-risk drivers were determined and compared to the driver population. Accident records and responses to a questionnaire distributed to a random sample of the driver population and to high-risk drivers were the data source for the study.

Frequency of accidents was found to be much higher among males than it was among females and was highest among teenage drivers. However, females had a higher accident rate. Teenage drivers had the highest accident rate. The rate decreased for middle-aged drivers and …

Development Of A Traffic Conflict Procedure For Kentucky, Charles V. Zegeer

Kentucky Transportation Center Research Report

The objective of this report was to develop a procedure for the collection and use of traffic conflict data. Data were collected at five intersections to determine characteristics of conflicts. Observer reliability was found to be excellent. Traffic volumes accounted for only about 30 percent of the variation in numbers of conflicts. At one intersection, repeatability of conflict numbers, rates, and types was found to be very good. A total of 6,535 conflicts and 2,957 benign weaves were observed at the test sites.

Based on the data, recommendations were made for collecting data during three peak hours at each site. …

Loads On Box Culverts Under High Embankments: Analysis And Design Considerations, David L. Allen, Rick L. Russ

Kentucky Transportation Center Research Report

Pressure and design analyses of five reinforced concrete box culverts are presented. Three of the culverts were constructed with the imperfect trench. Measured pressures on the culverts are compared to pressures predicted by the theories of Marston, Spangler, and Castes. Also, comparisons are made between measured pressures and calculated design pressures using AASHTO's Standard Specifications for Highway Bridges, 1.2.2(A). It is noted that the imperfect trench is, apparently, effective in reducing pressures on the top slab. The AASHTO design formulas underestimated the pressure on the top slab of the culverts without the imperfect trench.

Seatbelt Usage In Kentucky [Jan. 1978], Kenneth R. Agent, Michael Barclay

Kentucky Transportation Center Research Report

In this report, the effectiveness and usage of seatbelts by Kentucky motorists and factors affecting usage are examined and identified. Data were obtained from three sources: field observations, accident reports, and a questionnaire.

Kentucky drivers and passengers were found to have lower seatbelt usage rates (slightly under 10 percent) than drivers and passengers in other states. The accident data showed that the chances of being killed or severely injured is greatly reduced by wearing a seatbelt. Seatbelts reduced the chance of being killed by a factor of six and the chance of being severely injured by a factor of two. …

Analysis Of Time-Dependent Consolidation Data, E. Gregory Mcnulty, C. Thomas Gorman, Tommy C. Hopkins

Kentucky Transportation Center Research Report

No abstract provided.

Analysis Of Time-Independent Consolidation Data, E. Gregory Mcnulty, Tommy C. Hopkins, C. Thomas Gorman

Kentucky Transportation Center Research Report

The one-dimensional laboratory consolidation test developed by Terzaghi permits deformation and drainage only in the vertical direction. The stress-strain characteristics of data obtained from this test are normally studied using a semilogarithmic graphical representation, that is, vertical strain or void ratio is plotted as a function of the logarithm of effective stress. Such a representation permits an analysis of the stress history and compressibility characteristics of soils. Knowledge of these material characteristics is of great practical value in the prediction of settlement associated with loading where the effects of lateral consolidation may be neglected.

Kentucky Law Survey: Workmen's Compensation, Charles S. Cassis

Kentucky Law Journal

No abstract provided.

An Insurer's Liability To Third Parties For Negligent Inspection, Michael Braden

Kentucky Law Journal

No abstract provided.

The Lawyer's Independent Calling, Archibald Cox

Kentucky Law Journal

No abstract provided.

Flexible Pavement Designs To Support Various Vehicle Configurations, Robert C. Deen, Herbert F. Southgate

Kentucky Transportation Center Research Report

Pavement designers are often asked if pavements can be designed to carry and support the unusually heavy loads which have been known to use portions of the highway system. In some instances, for example, haul roads leading to highway or other construction projects or haul roads associated with mining, heavy loads have become commonplace and extra-legal. Within limitations of engineering experience, there appears to be no reason why pavements cannot be designed for these heavy loads. Of course, the restrictive factor in implementing such designs may be the excessive costs of construction. Even so, excessive maintenance costs otherwise associated with …

Traffic Conflicts As A Diagnostic Tool In Highway Safety, Charles V. Zegeer, Robert C. Deen

Kentucky Transportation Center Research Report

Because of the shortcomings in accident data, such as incomplete reporting and inaccurate information on accident reports, a need was found for indicators of accident potential. Nearly half of the 209 locations identified in Kentucky as hazardous by accident criteria were found to be falsely identified due to random accident occurrences. Accident repeatability from one year to the next was found to be poor at 60 intersections (r = 0.64) and 170 spot locations (r = 0.59). Up to two years of accident data were found to be necessary to obtain a reliable base of accident data.

Conflict counts were …

Analysis Of Tandem Axleloads By Elastic Theory, Herbert F. Southgate, Robert C. Deen, James H. Havens

Kentucky Transportation Center Research Report

AASHO Road Test tandem axleloads were analyzed to determine the magnitude of the tandem axleload that causes the same damage as the 18-kip (80-kN) single axleload. The procedure is outlined and is the same used to analyze single axleloads. The essential findings were as follows:

1. One repetition of a 34-kip ( 151-kN) tandem axleload appears to cause the same damage as one repetition of an 18-kip (80-kN) single axleload. 2. The relationships of log repetitions versus axleload used by Kentucky appear to be equally valid for single and tandem axleloads. 3. The use of superposition principles, and equivalency of …

Traffic Conflicts, Erratic Maneuvers, And Near-Miss Accidents: State-Of-The-Art, Charles V. Zegeer

Kentucky Transportation Center Research Report

Definitions are given for the various types of traffic conflicts, erratic maneuvers, and near-miss accidents. The General Motors technique for observation of traffic conflicts is summarized. Procedures used by several highway agencies for collecting conflict data are also detailed. Criteria which have been used to identify hazardous intersections using traffic conflict data are summarized. Methods and examples of evaluating safety improvements are detailed. Relationships between conflicts and accidents found by others were given.

The procedure for observing traffic conflicts on freeway ramps is described. Definitions are given for erratic maneuvers at lane drops, gore areas, and intersections. Results from studies …