Civil and Environmental Engineering Commons^™

Application Of Gravity And Intervening Opportunities Models To Recreational Travel In Kentucky, Kenneth D. Kaltenbach

Kentucky Transportation Center Research Report

Weekend outdoor recreational travel has a major impact on the highway network in Kentucky. Data from a previous study (1) indicate that the number of people visiting 42 typical Kentucky outdoor recreation areas on an average summer Sunday in 1970 was approximately 260,000. Most of these 42 areas, by virtue of their outdoor nature, are located in rural settings. Most have access to major arterial highways only by means of narrow, low standard rural roads. Traffic generated by the recreation areas and their associated developments severely strains these secondary access highways and places a significant additional load on the rural …

Rheological Response Of Asphalts, David L. Allen

Kentucky Transportation Center Research Report

The rheological response of asphalt cements to shearing stresses is presented. The behavioral characteristics were measured using a rotating coaxial cylinder viscometer. Little or no development of theory is presented.

The viscoelastic portion of deformation is discussed in terms of the creep function. Plastic deformation is described using the definitions of apparent and plastic viscosities. Curves showing the effects of temperature, stress level and penetration on these two major components of strain are presented and discussed. Analysis indicated that plastic deformation is the predominant component of strain and, thus, should be considered and incorporated in the design of flexible pavements.

Construction, Protection And Maintenance Of Concrete Bridge Decks, Ronald D. Hughes, James H. Havens

Kentucky Transportation Center Research Report

This report presents an historical account of deterioration in reinforced concrete bridge decks. Preventative maintenance treatments to both new and in-service decks are discussed. Repair methods are included. The major forms of deterioration are listed and causative mechanisms are discussed. Potential design and construction remedies are presented for consideration.

Operational Characteristics Of Lane Drops, Don L. Cornette

Kentucky Transportation Center Research Report

Traffic behavior studies were conducted at seven lane-drop locations, representing four lane-drop classes. These studies were composed of conflict observations (consisting of both erratic movement and brakelight applications), spot-speed observations, and lane volume counts. Such a study was made before and after each different traffic control device installation in an attempt to determine which device was the most effective in minimizing conflicts at existing lane drops. A study of conflict deviations indicates that no single type of traffic control device studied was significantly effective in reducing erratic movement and brakelight rates at all seven lane-drop locations. Rather, it appears that …

Unstable Embankment: Us 119 Harlan-Pineville Road Stations 1260 To 1265, Tommy C. Hopkins

Kentucky Transportation Center Research Report

In January I972, an in-depth investigation of an unstable embankment, Figure 1, on US 119 near Station 1262+00 was initiated. The site is approximately five miles southwest of Harlan and near Wilhoit. Figures 2 and 3 show a plan view and a typical cross-section, respectively. US 119 travels on a tangent from Station 1252+16 to 1255+54 in a northerly direction. From that point, the roadway gradually curves four degrees to the east, becoming tangent again near Station 1275+00. At about Station 1258+00, the roadway emerges from a cut, and near Station 1266+00 it reenters a small cut. Between the latter …

Skid Resistance Of Pavements [July 1972], Rolands L. Rizenbergs, James L. Burchett, Cass T. Napier

Kentucky Transportation Center Research Report

Standard pavement types and experimental surfaces on roads throughout Kentucky were evaluated in terms of skid resistance and effects of traffic, wear, and polishing. Friction-vs-speed gradients and the relationships between locked-wheel and incipient friction were determined. Class I bituminous pavements on high-speed, four-lane roads were found to be significantly more skid resistant than on two-lane highways and somewhat more skid resistant than concrete surfaces (especially those containing calcareous gravel aggregates). Sand-asphalt surfaces containing significant proportions of limestone sands showed inadequate level of friction for the traffic sustained. Several experimental sand asphalts without limestone sands exhibited greater skid resistance; Kentucky rock …

High-Intensity Reflective Materials For Signs, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The intuitive need for improved sign legibility has increased through the years as traffic volumes, speeds and roadway designs have advanced. Because of increased traffic volumes, low-beam headlight illumination at night has become more imperative. Signs are being located farther from the travelled lanes; higher speeds are requiring messages to be more legible at greater distances (for driver decision and response). Recent studies have indicated that even Engineering Grade (2200 and 3200 Series) Scotchlite or materials designated as Type I, Class A in S.P. No. 89-A, may be inadequate for some signing situations. Signs may be made larger and(or) incorporate …

Proposed Remedies: Unstable Embankment At Mile Post 188 And Channel Erosion At Mile Post 190-191; I 64, Boyd County, David R. Houchin, James H. Havens

Kentucky Transportation Center Research Report

The Department became aware of fill slippage on I 64 some 300 feet east of mile post 188 during the summer of 1967. In September of that year Mr. L. E. Richardson, Division of Maintenance, and Mr. Gordon D. Scott, Division of Research, made an inspection of the area. Mr. Scott reported cracking of shoulder, movement of the guard rail, and a failure in the berm along the toe. However, subsequent inspections showed the slip to be stabilizing by itself until late in 1970 when some additional movement was observed. In January of 1971, the most conspicuous pavement failure was …

Traffic Controls For Maintenance On High Speed Highways, William M. Seymour

Kentucky Transportation Center Research Report

Observations were first made at lane closures on interstate highways where yellow warning signs were erected routinely in conjunction with contract work. Later data provided direct comparison between new yellow and new orange signs. One sign scheme was used throughout the study. Driver obedience improved when new signs of either color were used; this finding implies that signs should always be maintained in good condition. Orange signs were slightly more effective than yellow signs in reducing traffic conflicts and merges near the traffic cones. The results of the study tend to support the adoption of orange as the standard color …

Expansive Limestone Aggregate In A Concrete Pavement, James H. Havens, Assaf S. Rahal

Kentucky Transportation Center Research Report

Recurrent blowups and surface cracking are common symptoms of distress in concrete pavements. Premature appearance of distress symptoms is alarming because the materials used in the concrete become suspect. Criteria for design, quality of materials, and construction are necessarily re-evaluated. Indeed, a dutiful effort to discover the cause(s) and to provide future safeguards is reasonably expected.

The analysis of causative factors besetting I 65-1(13)13 was complicated by an intuitive notion that blowups and surface cracks might be separate and independent problems. The crack pattern resembled the configuration of the wire mesh -- which was vibrated into position after the concrete …

An Operational Analysis Of The I 64, I 65, I 71 Route Junction In Louisville, Jerry G. Pigman, William M. Seymour, Kenneth R. Agent, Don L. Cornette

Kentucky Transportation Center Research Report

The Kennedy Interchange in Louisville is the most geometrically complicated of any in Kentucky; it is the junction of three interstate routes, I 64, I 65, and I 71. The many diverging, weaving, and merging movements demand a driver's attention. One merging situation collapses into an impasse during peak-hour traffic. This study is responsive to certain inquiries by the Department concerning safety and possible discovery of design deficiencies at this interchange. It was not intended to be an in-depth study but rather an exploratory identification of problems and their locations; more comprehensive studies, by others, would ensue if needed. The …

Comparative Evaluation Of Raygo 404 Vibratory Roller, Jerry D. Ross, Herbert F. Southgate, Donald C. Newberry Jr.

Kentucky Transportation Center Research Report

Roller evaluations are rather phenomenological -- that is, one must rely somewhat on observations. Density measurements following each excursion of the compactor may not relate directly to the work done in compressing the layer. When no increase in density is realized, no work is accomplished. Work is defined here in the classical sense. Energy expended without producing an increase in density is wasted. Thereafter, the only way additional classical work can be done on the layer is to reduce density.

The number of excursions necessary to achieve an acceptable or comparable density generally reflects efficiency of the compactor. Much may …

Urban Expressway Design, Edmund F. Passarelli

Kentucky's Annual Forum on Transportation

No abstract provided.

The Environment And Highways, John D. Cherry

Kentucky's Annual Forum on Transportation

No abstract provided.

Traffic Noise-Techniques For Measurement And Control, Louis F. Cohn

Kentucky's Annual Forum on Transportation

No abstract provided.

Full-Depth Asphalt Concrete Pavement, William B. Drake

Kentucky's Annual Forum on Transportation

No abstract provided.

Quality Crushed Stone Construction, F. P. Nichols Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Continuously Reinforced Concrete Pavement, Robert C. Deen

Kentucky's Annual Forum on Transportation

No abstract provided.

Urban Mass Transportation Programs, A. R. Childs

Kentucky's Annual Forum on Transportation

No abstract provided.

Remarks During The Municipal Government Session, Charles Pryor Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Legislation Enacted By The 1972 General Assembly: Senate Bills 114 And 68, Dolly Mcnutt

Kentucky's Annual Forum on Transportation

No abstract provided.

U.S. 25-U.S. 42 Replacement Bridge Over The Ohio River Between Covington, Kentucky And Cincinnati, Ohio, Logan L. Ratliff

Kentucky's Annual Forum on Transportation

No abstract provided.

Evaluation Of Timber Caisson Us 25 Bridge Over Ohio River, Jas H. Havens, Assaf Rahal

Kentucky's Annual Forum on Transportation

No abstract provided.

Introduction Of Us25-Us42 Bridge Panel Discussion, Charles G. Cook

Kentucky's Annual Forum on Transportation

No abstract provided.

Bridges And Navigation Interests, S. W. Thoroughman

Kentucky's Annual Forum on Transportation

No abstract provided.

Kentucky's Approach To Development, Howard C. Lawson Jr.

Kentucky's Annual Forum on Transportation

No abstract provided.

Rural Roads Program, Otto Ingram

Kentucky's Annual Forum on Transportation

No abstract provided.

Luncheon Address [1972], Wendell H. Ford

Kentucky's Annual Forum on Transportation

No abstract provided.

Remarks By Charles Pryor, Jr., Charles Pryor

Kentucky's Annual Forum on Transportation

No abstract provided.

Note To Conference Registrants [1972], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.