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Articles 35221 - 35250 of 40005

Full-Text Articles in Civil and Environmental Engineering

Traffic Accident Rates In Kentucky (1983), John M. Salsman, Kenneth R. Agent Jan 1985

Traffic Accident Rates In Kentucky (1983), John M. Salsman, Kenneth R. Agent

Kentucky Transportation Center Research Report

In this study, two types of accident rates were determined. First, accident rates were calculated based on 1983 data. Secondly, the 1983 data were combined with the 1980, 1981, and 1982 data to calculate long-term accident statistics to reflect a four-year average.

Comparison of 1983 to combined 1980 through 1982 rates show that the rates have remained remarkedly stable. Several methods of classifying highways were used when determining average rates. Average and critical accident rates were calculated for use in the high-accident location identification program. Also, average and critical numbers of accidents were determined.


Comparison Of Contained Rock Asphalt Mat (Cram) With Conventional Asphaltic Concrete Pavements, Herbert F. Southgate, David L. Allen, Robert C. Deen Jan 1985

Comparison Of Contained Rock Asphalt Mat (Cram) With Conventional Asphaltic Concrete Pavements, Herbert F. Southgate, David L. Allen, Robert C. Deen

Kentucky Transportation Center Research Report

A brochure proposing the use of "Contained Rock Asphalt Mat" (CRAM) provided a comparison of stress distributions throughout a CRAM structure (Figure 1) as compared to a conventional pavement (Figure 2). Experience has indicated that stress distributions do not always present the most sensitive or appropriate analysis of a pavement structure. Distributions of strains, and more particularly "work", are better indicators of load distributions throughout a pavement structure and subsequent performance.


Evaluation Of Truck Escape Ramps, Jerry G. Pigman, Kenneth R. Agent Jan 1985

Evaluation Of Truck Escape Ramps, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

Out-of-control vehicles on steep grades have the potential for and frequently do result in severe accidents. There are two truck escape ramps in Kentucky, and both were constructed as a result of severe accidents and the potential for additional accidents.

One escape ramp is on the Hyden Spur (KY 118) in Leslie County. Because of geometric conditions of the highway and topographic constraints, an arrester-type escape ramp was designed with pea gravel as the arrester material. The beginning of the ramp is a 386-foot paved section on an 8-percent downgrade; followed by a gravel bed 520 feet long on a …


Structural Analysis Of Rigid Pavements With Pumping: Summary Informational Report, Jesus Silverio Larralde Jan 1985

Structural Analysis Of Rigid Pavements With Pumping: Summary Informational Report, Jesus Silverio Larralde

JTRP Technical Reports

No abstract provided.


Pcstabl4 User Manual : Information Report, James Richard Carpenter Jan 1985

Pcstabl4 User Manual : Information Report, James Richard Carpenter

JTRP Technical Reports

No abstract provided.


Selection And Use Of Fly Ash For Highway Concrete, Sidney Diamond Jan 1985

Selection And Use Of Fly Ash For Highway Concrete, Sidney Diamond

JTRP Technical Reports

No abstract provided.


Energy Conservation And Cost Savings Related To Highway Maintenance: Executive Summary, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha Jan 1985

Energy Conservation And Cost Savings Related To Highway Maintenance: Executive Summary, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.


A Routine Maintenance And Pavement Performance Relationship Model For Highways : Informational Report, Tien Fang Fwa, Kumares C. Sinha Jan 1985

A Routine Maintenance And Pavement Performance Relationship Model For Highways : Informational Report, Tien Fang Fwa, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.


Energy Conservation And Cost Savings Related To Highway Maintenance, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha Jan 1985

Energy Conservation And Cost Savings Related To Highway Maintenance, Mitsuru Saito, Essam Abdel-Aziz Sharaf, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.


Absorption And Absorptivity Of Aggregates As Indicators Of Frost Durability : Informational Report, Jack Duvall Hunter Jan 1985

Absorption And Absorptivity Of Aggregates As Indicators Of Frost Durability : Informational Report, Jack Duvall Hunter

JTRP Technical Reports

No abstract provided.


Evaluation Of Miramat Under High Velocity Flows, C. Earl Israelsen, Frank W. Haws Jan 1985

Evaluation Of Miramat Under High Velocity Flows, C. Earl Israelsen, Frank W. Haws

Reports

Introduction: Newly constructed earth channels and steep cut and fill slopes on construction projects need temporary protection from water erosion until a protective cover of vegetation can be grown. In some instances the temporary protective measures can be left in position to serve as part of the permanent system. Various kinds of vegetative and chemical mulches are available for use as temporary control measures, and other materials such as jute, fiberglass roving, and excelsior blanket are also in use. However, for large volumes of flow and for high velocities, more substantial materials are required. One class of such materials is …


The Effect Of The Degree Of Saturation On The Permeability Of A Compacted Clay To Organic Permeants, Mark Alan Harms Jan 1985

The Effect Of The Degree Of Saturation On The Permeability Of A Compacted Clay To Organic Permeants, Mark Alan Harms

Masters Theses

"Relationships for permeability of kaolinite versus degree of saturation and permeability versus flow are developed for 0.005 N calcium sulphate, xylene and aniline permeants using the triaxial flexible wall permeameter. The clay was statically compacted at degrees of saturation of 50%, 75% and 100%. A gradient of 277 was used for the permeability tests.

The initial degree of saturation was inversely related to the permeability of the clay. Saturated clay samples were found to be virtually impervious to aniline and xylene. As the degree of saturation decreased, the permeability increased with the initial volume of flow equivalent to the volume …


Speed Report No. 118 : Interim Report, C. J. Oliva, Robert M. Shanteau, George K. Stafford, Leroy Gray Jan 1985

Speed Report No. 118 : Interim Report, C. J. Oliva, Robert M. Shanteau, George K. Stafford, Leroy Gray

JTRP Technical Reports

No abstract provided.


Embark-Telar-Surfactant-2, 4-D Combination For Vegetation Management Along Indiana Roadsides : Interim Summary Report, D. James Morré Jan 1985

Embark-Telar-Surfactant-2, 4-D Combination For Vegetation Management Along Indiana Roadsides : Interim Summary Report, D. James Morré

JTRP Technical Reports

No abstract provided.


Development Of An Energy Audit Manual For Indiana Department Of Highway Buildings, Brett Michael Partridge Jan 1985

Development Of An Energy Audit Manual For Indiana Department Of Highway Buildings, Brett Michael Partridge

JTRP Technical Reports

No abstract provided.


Systematic Analysis Of Noninferior Transfer Assignments, J. R. Wright, Steven Christian Egly, H. W. Gallivan Jan 1985

Systematic Analysis Of Noninferior Transfer Assignments, J. R. Wright, Steven Christian Egly, H. W. Gallivan

JTRP Technical Reports

No abstract provided.


Effects Of Endomycorrhizal Inoculation On Growth Of Selected Landscape Plants Used In Highway Revegetation, Stephen Dunning Verkade, Philip L. Carpenter Jan 1985

Effects Of Endomycorrhizal Inoculation On Growth Of Selected Landscape Plants Used In Highway Revegetation, Stephen Dunning Verkade, Philip L. Carpenter

JTRP Technical Reports

No abstract provided.


The Identification Of Areas Of Routine Maintenance Productivity Improvement, Stephen M. O'Brien, Kumares C. Sinha Jan 1985

The Identification Of Areas Of Routine Maintenance Productivity Improvement, Stephen M. O'Brien, Kumares C. Sinha

JTRP Technical Reports

No abstract provided.


Stabl5: The Spencer Method Of Slices, James Richard Carpenter Jan 1985

Stabl5: The Spencer Method Of Slices, James Richard Carpenter

JTRP Technical Reports

No abstract provided.


The Use Of Fuzzy Sets Mathematics To Assist Pavement Evaluation And Management, Manol Andonyadis, A. G. Altschaeffl, Jean-Lou Chameau Jan 1985

The Use Of Fuzzy Sets Mathematics To Assist Pavement Evaluation And Management, Manol Andonyadis, A. G. Altschaeffl, Jean-Lou Chameau

JTRP Technical Reports

No abstract provided.


Compressibility And Shear Strength Characteristics Of Impact Compacted Lacustrine Clay : Informational Report, Samuel Onyeabor Nwabuoekei Jan 1985

Compressibility And Shear Strength Characteristics Of Impact Compacted Lacustrine Clay : Informational Report, Samuel Onyeabor Nwabuoekei

JTRP Technical Reports

No abstract provided.


Rigid Pavement Pumping: (1) Subbase Erosion And (2) Economic Modeling : Informational Report, Wijk Adriaan Van Jan 1985

Rigid Pavement Pumping: (1) Subbase Erosion And (2) Economic Modeling : Informational Report, Wijk Adriaan Van

JTRP Technical Reports

No abstract provided.


Behavior Of Mucks And Amorphous Peats As Embankment Foundations : Interim Report, Paul Gerard Joseph Jan 1985

Behavior Of Mucks And Amorphous Peats As Embankment Foundations : Interim Report, Paul Gerard Joseph

JTRP Technical Reports

No abstract provided.


1985 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Herpicc Jan 1985

1985 Directory Of Indiana State, County, City And Town Officials Responsible For Road And Street Work, Herpicc

Indiana Local Technical Assistance Program (LTAP) Directory

Contact information for agency officials and employees responsible for Indiana’s local road infrastructure.


Least Tern Anp Piping Plover Biological Assessment Missouri River Bank Stabilization O&M Jan 1985

Least Tern Anp Piping Plover Biological Assessment Missouri River Bank Stabilization O&M

United States Army Corps of Engineers, Omaha District

The Omaha District Corps of Engineers proposes to undertake maintenance of bank stabilization structures and streambank erosion control structures along the Missouri River.  One project would involve about 50 repairs of revetments, hardpoints, and refusals along the Missouri National Recreational River (MNRR) reach, Gavins Point Dam to Ponca, Nebraska (river mile 810-750).  The second project would involve about 250 repairs of dikes and revetments along the navigation channel from Florence Bend through Rulo Bend (river miles 627-498).

The interior least tern is being Federally listed as an endangered species.  The tern has a history of use of the Missouri River, …


Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf‑Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian Jan 1985

Development Of Optimal Sustained Yield Groundwater Withdrawal Strategies For The Boeuf‑Tensas Basin In Arkansas, Richard C. Peralta, Bithin Datta, Jamal Solaimanian, Paul J. Killian, Amin Yazdanian

Civil and Environmental Engineering Faculty Publications

No abstract provided.


Optimal Regional Potentiometric Surface Design: Least Cost Water Supply/Sustained Groundwater Yield, Richard C. Peralta, Paul J. Killian Jan 1985

Optimal Regional Potentiometric Surface Design: Least Cost Water Supply/Sustained Groundwater Yield, Richard C. Peralta, Paul J. Killian

Civil and Environmental Engineering Faculty Publications

A distributed parameter groundwater management model utilizing quadratic programming to develop an optimal regional steady-state potentiometric surface and its sustained groundwater withdrawal strategy is presented. It minimizes the regional cost of attempting to satisfy the water needs of each finite-difference cell (a) from groundwater and diverted surface water or (b) from groundwater and reduction of water needs achieved by reducing production acreages. Groundwater elevations, withdrawal and recharge are constrained, satisfying legal and hydrologic constraints. The technique is applicable for assuring a regional sustained yield of groundwater in a conjunctive water management setting. It represents the first application of optimization in …


A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams Jan 1985

A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams

Reports

Deer Creek Reservoir and tributaries were monitored from May to December 1983 in a study of the occurrence of trihalomethane (THM) precursors in the reservoir and nutrient dynamics of the reservoir system. Microcosms were used to study the effect of the following parameters on THM precursor production in the reservoir system: phosphorus loading, sediment, algal growth, and application of algicide. Additionally, THM precursor concentrations of interstitial water were analyzed in reservoir and microcosm sediment samples. Microcosms treated with ahigh phosphorus loading (70 ug/1) had THM precursor concentrations significantly higher than those measured in microcosms treated with a low phosphorus loading …


Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks Jan 1985

Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks

Reports

Sensitized photooxidation is a physicochemical process that can degrade many toxic and refractory organic pollutants. A trace quantity of sensitizer added to the waste absorbs visible light; electronically excited intermediates then transfer the energy to decompose the waste. Engeineering design criteria were developed for industrial waste treatment lagoons that would use sensitized photooxidation. Design criteria were developed regarding optimum lagoon pH, optimum sensitizer concentration, depth and sizing of lagoons, dissolved oxygen requirements, and effect of temperature on photooxidation rate. Treatment of the refractory pesticides bromacil, terbacil, and fluometuron was investigated using methylene blue and riboflavin as sensitizers. Methylene blue-sensitized photooxidation …


Assessment Of Control Alternatives For The Great Salt Lake, L. Douglas James, David S. Bowles Jan 1985

Assessment Of Control Alternatives For The Great Salt Lake, L. Douglas James, David S. Bowles

Reports

Introduction: Over the last few years, the rising level of the Great Salt Lake has changed Utah. It has inundated vast waterfowl feeding areas, crippled the salt industry, required raising transcontinental freeways and railroads, threatened metropolitan waste treatment plants, caused a major electrical outage, and damaged many properties. If nothing is done, approximately $3.6 billion of damages in 1985 dollars can be expected by 2050 (James et al, 1985, p.4). This threat led the State Legislature to set aside $100 million (an amount approximating the damages that had then occurred) in January 1985 to identify, select, and implement remedial measures. …