Investigation of Tire-Road Noise Levels for Ohio Pavement Types

2000 ◽  
Vol 1702 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Lloyd A. Herman ◽  
Matt J. Ambroziak ◽  
Elvin Pinckney
Keyword(s):  
United States ◽  
Traffic Noise ◽  
The United States ◽  
International Organization ◽  
Noise Prediction ◽  
Department Of Transportation ◽  
Noise Levels ◽  
Road Noise ◽  
Prediction Modeling ◽  
Noise Measurements

Tire-road noise levels for Ohio Department of Transportation pavement types were investigated to provide an additional criterion for pavement selection in noise-sensitive areas. Tire-road noise measurements were conducted in accordance with the International Organization for Standardization’s statistical pass-by method (ISO 11819-1)—the first use of this standard in the United States. A statistical pass-by index (SPBI) was determined for each pavement test, which enabled the ranking of the pavement types according to tire-road noise levels, as well as a means of comparing results with other studies conducted according to the standard. There was a difference of 6.7 dB between the lowest (open-graded asphalt) and the highest (random-transverse-grooved concrete) SPBI for all of the pavements measured. Additionally, the data were analyzed to produce reference energy mean emission levels for future use with traffic-noise prediction modeling.

Quantification of Pass-by Noise Levels on Urban Roads: Effect of Engine Propulsion and Tire–Road Interaction

2020 ◽  
Vol 19 (03) ◽  
pp. 2050030
Author(s):  
Kamineni Aditya ◽  
Venkaiah Chowdary
Keyword(s):  
Traffic Noise ◽  
Heterogeneous Traffic ◽  
Vehicle Speed ◽  
Concrete Pavements ◽  
Noise Levels ◽  
Road Noise ◽  
Noise Sources ◽  
Vehicle Noise ◽  
Integrated Method ◽  
Noise Measurements

Vehicle speeds frequently fluctuate due to the prevailing heterogeneous traffic conditions on Indian roads. Accordingly, traffic noise levels are affected by different noise sources that depend on various vehicular and roadway characteristics. In order to simulate the actual vehicle noise generation at the possible speeds on Indian roads, an integrated method has been developed in this study to quantify the engine and tire–road noise levels. The governing parameters considered for the pass-by noise quantification include vehicle speed, type of pavement and gear shift/gear transmission. The measured A-weighted noise levels [LAmax (dB)] revealed that tire–road noise levels increased with the rise in vehicle speeds irrespective of the vehicle type and type of the pavement. Further, the tire–road noise levels quantified through the new methodology closely matched the noise levels measured by the standard coast-by method. The cross-over speeds for engine propulsion noise and tire–road interaction noise occur at much lower speeds on the cement concrete pavements compared to the asphalt pavements. On a decisive note, the perspective of measuring the roadside noise levels coupled with an engine propulsion noise measurement as reported in this study is first of its kind and can be used for noise measurements on critical urban roads by priming with the conventional pass-by methods.

An Assessment of Simulations on an : International Organization

1985 ◽  
Vol 47 ◽  
pp. 4-5
Author(s):  
Paul F. Diehl ◽  
Michael J. Montgomery
Keyword(s):  
United States ◽  
United Nations ◽  
Political Science ◽  
International Organizations ◽  
Recent Literature ◽  
The United States ◽  
Theory And Practice ◽  
International Organization ◽  
Potential Value ◽  
Existing Structure

Simulation is an increasingly popular pedagogical device; much of the recent literature on the theory and practice of political science instruction attests to this. Probably the most popular simulation device is called model United Nations. In recent articles in Teaching Political Science and NEWS for Teachers of Political Science, William Hazelton and James Jacob have described Model United Nations in glowing terms, focusing on one particular conference and completely ignoring the rest of the 200 or more conferences held annually across the United States.Like Jacob and Hazelton, we recognize the great potential value of United Nations simulations in trying to illuminate the often confusing politics of international organizations. As former participants and directors of these programs, however, we are keenly aware of the shortcomings and difficulties associated with the existing structure of model U.N. programs.

Noise Issues of Concrete-Pavement Texturing

2000 ◽  
Vol 1702 (1) ◽  
pp. 69-79 ◽  
Author(s):  
John R. Jaeckel ◽  
David A. Kuemmel ◽  
Yosef Z. Becker ◽  
Alex Satanovsky ◽  
Ronald C. Sonntag
Keyword(s):  
Second Phase ◽  
Department Of Transportation ◽  
Portland Cement Concrete ◽  
Noise Levels ◽  
The Road ◽  
Wisconsin Department ◽  
Noise Characteristics ◽  
Texture Parameters ◽  
Noise Measurements ◽  
Using Data

The second phase of a project researching the texture and noise characteristics of portland cement concrete (PCC) pavements was sponsored by the Wisconsin Department of Transportation and FHWA. The team of Marquette University and HNTB Corporation measured and analyzed the noise and texture parameters of 57 test sites in Colorado, Iowa, Michigan, Minnesota, North Dakota, and Wisconsin. Conclusions pertaining to tire-and-pavement noise were drawn using data from several types of acoustical tests, including objective noise measurements (exterior and interior), subjective noise evaluations, and a prominent frequency analysis. Texture parameters of all test sites were measured with the road surface analyzer (ROSAN). ROSAN texture measurements proved invaluable in analyzing why different textures exhibited different noise characteristics. Both uniform and random transverse tining provide higher interior and exterior noise levels than skewed or longitudinal tining. Transverse tining, even in some random-spaced textures, can cause a discrete frequency or whine. As the depth and width of tining increased, so did the noise levels. Randomly spaced patterns are sensitive to spacing. Ground PCC pavement exhibited no discrete frequencies. Recommendations include the need for better quality control over tining and a wet-pavement-accident study of longitudinal tining. If noise considerations are paramount, longitudinal tining is recommended. If texture is paramount, skewed tining is recommended. If a skew is not possible, then carefully constructed random transverse is recommended.

Data Collection and Modeling Results to Permit Estimation of Meteorological Effects on Roadway Noise

2019 ◽  
Vol 2673 (11) ◽  
pp. 243-253
Author(s):  
Roger L. Wayson ◽  
Kenneth Kaliski ◽  
John M. MacDonald ◽  
Erik M. Salomons ◽  
Darlene D. Reiter
Keyword(s):  
United States ◽  
Data Collection ◽  
Road Traffic ◽  
Meteorological Data ◽  
Traffic Noise ◽  
The United States ◽  
Road Traffic Noise ◽  
Atmospheric Conditions ◽  
Noise Propagation ◽  
Meteorological Effects

The estimation of absolute road traffic noise levels without including the effects of meteorology is thought to be a major source of error in the estimation process commonly used in the United States. In response, the Transportation Research Board-sponsored NCHRP 25-52, Meteorological Effects on Roadway Noise, to collect highway noise data under different meteorological conditions, document the meteorological effects on roadway noise propagation under different atmospheric conditions, develop best practices, and provide guidance on how to (a) quantify meteorological effects on roadway noise propagation and (b) explain those effects to the public. The completed project involved collecting and analyzing 35,000 min of sound and meteorological data at 16 barrier and no-barrier measurement positions adjacent to Interstate 17 in Phoenix, Arizona. This report provides information on the data collection and the modeling recommendations. The database assembled is thought to be among the best available in the United States to permit analysis of meteorological effects on roadway noise. The study recommendations will advance the methodology for estimating the meteorological effects on roadway noise in the United States.

scholarly journals Road Noise Levels in Urban Environment Compared to Specification Limits. The Case of the City of Larissa, Greece

2020 ◽  
Author(s):  
Emmanouil A. Papadimitriou ◽  
Grigorios P. Papageorgiou ◽  
Nikolaos Alamanis ◽  
Theodosia-Niki Diakosavva
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise ◽  
Noise Levels ◽  
Road Noise ◽  
Greek City ◽  
Limit Values ◽  
High Noise ◽  
Specification Limits ◽  
The City

Greece, as well as other developed countries, is facing the growing problem of road traffic noise. It stands for a severe problem in the urban areas of the country, including the city of Larissa. The root cause is the huge increase in traffic volume and the lack of adequate urban infrastructure planning. Estimation of the level of road traffic noise is usually conducted using acoustic meters. It is widely accepted that most of the cities’ population is exposed to high noise levels due to controversial traffic capacity. Moreover, high noise levels are strongly related to phycological and neurological diseases. Thus, it is of utmost importance, the road noise levels to be lower than dictated by relevant specification limits. To develop better noise-environment policies, relative research should focus on the measurement of in-situ noise levels, so as appropriate for each case corrective measures to be taken. The present paper examines the noise levels of a center road of the 5th Greek city, in terms of population, compared to worldwide adopted noise specification limits. The clear aim stands for finding the percentage of road noise that exceeds commonly accepted threshold values, namely limit values of European Union and World Health Organization. The results of this research strongly indicate that measured noise values override upper limit values in a certain extent.

An evaluation of warranty contracting in the United States of America

2006 ◽  
Vol 33 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Mehmet Emre Bayraktar ◽  
Qingbin Cui ◽  
Makarand Hastak ◽  
Issam Minkarah
Keyword(s):  
United States ◽  
United States Of America ◽  
The United States ◽  
Department Of Transportation ◽  
Construction Costs ◽  
Advantages And Disadvantages ◽  
Contract Administration ◽  
State Highway ◽  
Early Failures ◽  
State Highway Agencies

It is believed that warranty contracting would benefit state highway agencies by improving quality, saving money and time, and encouraging contractors' innovations. However, the challenges associated with warranties could be substantial, including higher costs, early failures, a reduction or even elimination of small contractors from the bidding process, and an increase in contract disputes and litigation. The actual impact of warranty provisions on state Department of Transportation (DOT) projects in the United States of America is still unclear because of limited industry experience. This paper provides a detailed discussion of warranty provisions and the benefits and problems associated with the subject matter. The advantages and disadvantages of warranty provisions are evaluated from the conflicting perspectives of state Departments of Transportation (DOTs), contractors, and surety companies. The future prospects of warranty provisions are established based on the findings of a recent study of warranty provisions and existing literature. Also, several options are proposed that have a strong potential to improve the application of warranties on DOT projects.Key words: warranties, highway construction, innovation, highway maintenance, contract administration, construction costs, construction inspection.

Design of a Mobile Platform for Overhead Detectors for Vehicles on the Highway

2004 ◽  
Author(s):  
Jacob S. Duane ◽  
Joe A. Palen ◽  
Fidelis O. Eke ◽  
Harry H. Cheng
Keyword(s):  
United States ◽  
The United States ◽  
Department Of Transportation ◽  
Ground Vehicles ◽  
Highway Traffic ◽  
Road Vehicles ◽  
California Department ◽  
New Family ◽  
Technical Study ◽  
Electronic Sensing

The California Department of Transportation, like many such departments in the United States, is working on developing a new family of electronic sensing devices for the purpose of monitoring certain characteristics of road vehicles as they move along the highway. The devices currently under development are to be located overhead individual highway traffic lanes, from where they can have a clear “view” of ground vehicles. In order to deploy these devices, there is a need to develop the capability to safely and efficiently mount them above highway traffic lanes, using existing overhead bridges and sign structures as support structures. This paper presents a technical study of a universal support platform for these devices. The study discusses such issues as mobility, reliability, and resistance to environmental and other hazards. Results of tests conducted on a prototype are also presented.

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