Engineering Commons^™

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.

Degradation Of Limestone Aggregate During Construction, Robert C. Deen, Herbert F. Southgate

Kentucky Transportation Center Research Report

Twelve construction projects were sampled at the plant, from the spreader box, after spreading, and after compacting. Laboratory tests including gradation analysis, ball-mill wear tests, Atterberg limits, and specific gravity were performed to determine changes in gradations. Kentucky limestones are very hard, high quality aggregates, with no significant degradation characteristics under current construction practices. On a given project, the construction procedure did not cause any significant degradation. Amongst projects, variances can be significant; however, this is attributable to the variation in initial gradations on the different projects.

Noise Pollution And Abatement: A Review Of Literature, Kenneth R. Agent, Robert C. Deen

Kentucky Transportation Center Research Report

Complaints concerning traffic noise and possibly seismic vibrations emanating from highways would probably have been adjudicated on the basis of common law doctrines pertaining to "nuisances", "common enemy'', and ''power of relief" were it not for recent legislation and regulations directed toward protection of the total environment. In effect, "freedom from noise" has been added to the clean water, clean air, clean earth policies. Surely each of those policies are founded on public sentiment.

There have been a few instances where the Department has yielded relief because of traffic noise. Now safeguarding regulations seem inevitable.

In the past, this Division …

Stress Histories Of Bridge Members From Scratch Gage Records, Ronald D. Hughes

Kentucky Transportation Center Research Report

This report describes the use of scratch gages for obtaining strain histories of bridge members. Basic components of the gage are designated and its operation is described in general terms. Stress histories, deduced from strain records, for various members of three bridges obtained through use of the gages are presented. A procedure for use in replicating sections of deteriorated members is described.

Bridges: Synthesis Of Load Histories And Analysis Of Fatigue, James H. Havens, Robert C. Deen

Kentucky Transportation Center Research Report

Repeated stressing of metals above certain limits induces inter- and intra-crystalline dislocations and cleavages and eventually cracks which propagate to failure. Some authorities consider crack propagation to be a separate and discrete stage in the failure process. The internal damage is insidiously cumulative and irreversible. This phenomenon was recognized as early as 1829 and was termed fatigue as early as 1839(1). From the beginning of fatigue testing (Wohler, 1858-1870), results have been reported as S-N, S-log N, or log S-log N curves, where N is the number of repetitions of stress S. From a structural design point of view, …

Chronological Listing Of Research Reports, Division Of Research, Kentucky Department Of Highways

Kentucky Transportation Center Research Report

No abstract provided.

Experimental Overlay Of Glazon Over Two Bridge Decks, Assaf S. Rahal, A. B. Blankenship

Kentucky Transportation Center Research Report

In accordance with a Personal Service Agreement entered into with the Glazon Industries, Inc., on July 2, 1971, the two subject decks were patched and overlayed with Glazon. On July 27, 1971, work started on RP 106-286-HG3, KY 395 bridge over I 64 in Shelby County. Work consisted of routing old concrete and sandblasting the surface (Figures 1 and 2). State personnel and equipment were used for all cleaning operations. The same procedures were followed to clean HM 99-1324A-MB3 in Powell County near Clay City.

On July 28, 1971, Glazon personnel and equipment arrived at the work site in Shelby …

Subject Listing Of Research Reports, Division Of Research, Kentucky Department Of Highways

Kentucky Transportation Center Research Report

No abstract provided.

Pavement Roughness Measurement And Evaluation, Rolands L. Rizenbergs, James L. Burchett, Larry E. Davis

Kentucky Transportation Center Research Report

Vertical accelerations of a passenger in an automobile are automatically summed while traveling a section of road at 51.5 mph. A roughness index is obtained by summing the accelerations and dividing by the time elapsed during the test. The index is subjectively related to the riding quality of pavements. Continuity in measurements since 1957 has been preserved through correlations among successive vehicles involved and reference pavements.

In general, bituminous construction has yielded smoother-riding surfaces than concrete construction. No major improvements in construction were noted on bituminous pavements since 1962. The ride quality of concrete pavements, however, has improved on those …