Method for Measuring Vehicle Noise Source Heights and Subsource Spectra

1996 ◽  
Vol 1559 (1) ◽  
pp. 8-13
Author(s):  
Robert Coulson
Keyword(s):  
Noise Source ◽  
Traffic Noise ◽  
Regression Equations ◽  
Department Of Transportation ◽  
Vehicle Noise ◽  
Level Data ◽  
Analysis System ◽  
Transportation Agencies ◽  
Rapid Data Acquisition ◽  
Subsequent Incorporation

The U.S. Department of Transportation in cooperation with FHWA and several state transportation agencies is collecting a highway noise database for the development of noise-level regression equations. These data and equations will provide the foundation for the new traffic noise software, TNS. In addition to collecting reference energy mean emission level data, this test plan also requires an extensive database of source heights and subsource spectra covering all vehicle classes and possible roadway parameters. A description is provided of a turnkey rapid data acquisition and analysis system that was developed to collect a large database of vehicle noise source heights and subsource spectra for subsequent incorporation into TNS. Included is a summary of the analysis algorithm used to calculate the source heights, a description of the data collection system, and a brief summary of the data collected to date.

Comparison of Overnight Truck Parking Counts with GPS-Derived Counts for Truck Parking Facility Utilization Analysis

2019 ◽  
Vol 2673 (8) ◽  
pp. 377-387 ◽  
Author(s):  
Karla Diaz Corro ◽  
Taslima Akter ◽  
Sarah Hernandez
Keyword(s):  
Global Positioning System ◽  
Survey Methodology ◽  
Population Level ◽  
Department Of Transportation ◽  
Expansion Factor ◽  
Arrival Times ◽  
Global Positioning ◽  
Facility Type ◽  
Transportation Agencies ◽  
Parking Facilities

Increased demand for truck parking resulting from hours-of-service regulations and growing truck volumes, coupled with limited supply of parking facilities, is concerning for transportation agencies and industry stakeholders. To monitor truck parking congestion, the Arkansas Department of Transportation (ARDOT) conducts an annual observational survey of truck parking facilities. As a result of survey methodology, it cannot capture patterns of diurnal and seasonal use, arrival times, and duration. Truck Global Positioning System (GPS) data provide an apt alternative for monitoring parking facility utilization. The issue is that most truck GPS datasets represent a sample of the truck population and the representativeness of that sample may differ by application. Currently no method exists to accurately expand a GPS sample to reflect population-level truck parking facility utilization. This paper leverages the ARDOT study to estimate GPS “expansion factors” by parking facility type and defines two expansion factors: (1) the ratio of trucks parked derived from the GPS sample to those observed during the Overnight Study, and (2) the ratio of truck volume derived from the GPS sample to total truck volume measured on the nearest roadway. Varied expansion factors are found for public, private commercial (e.g., restaurant, retail store, etc.), and private truck stop facilities. Comparatively, the expansion factor based on roadway truck volumes was at least twice as high as that derived from the Overnight Study. Considering this, the method to determine expansion factors has significant implications on the estimated magnitudes of parking facility congestion, and thus will have consequences for investment prioritization.

Perception of Traffic Noise Barrier Effectiveness: Public Opinion Survey of Residents Living near I-71

1997 ◽  
Vol 1601 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Lloyd A. Herman ◽  
Michael A. Finney ◽  
Craig M. Clum ◽  
E.W. Pinckney
Keyword(s):  
Public Opinion ◽  
Traffic Noise ◽  
Department Of Transportation ◽  
Opinion Survey ◽  
Noise Barriers ◽  
Noise Abatement ◽  
Public Controversy ◽  
Public Opinion Survey ◽  
Project Area ◽  
Noise Barrier

The completion of the largest Ohio Department of Transportation traffic noise abatement project in 1995 was met with public controversy over the effectiveness of the noise barriers. A public opinion survey was designed to obtain the perceptions of the residents in the project area. In a departure from most surveys of traffic noise barrier effectiveness, the coverage was not limited to the first or second row of houses, but was extended to 800 m on each side of the roadway. It was found that the larger survey area was needed to avoid misleading conclusions. Overall perceptions of noise barrier effectiveness were found to vary with distance from the roadway and with noise barrier configuration.

scholarly journals People exposed to traffic noise in european agglomerations from noise maps. A critical review

Noise Mapping ◽  
2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Miguel Arana ◽  
Ricardo San Martin ◽  
Juan C. Salinas
Keyword(s):  
Road Traffic ◽  
Noise Source ◽  
Traffic Noise ◽  
Noise Pollution ◽  
Environmental Noise ◽  
Action Plans ◽  
Implementation Phase ◽  
Pollution Levels ◽  
Input Variables ◽  
The Impact

AbstractTwo of the main objectives of the European Directive on environmental noise are, firstly, to unify acoustic indices for assessing environmental noise and, secondly, to standardize assessment methodologies. The ultimate goal is to objectively and comparably manage the impact and evolution of environmental noise caused both by urban agglomerations and by traffic infrastructures (roads, rails and airports). The use of common indices and methodologies (together with five-year plan assessment required by the authorities in charge) should show how noise pollution levels are evolving plus the effectiveness of corrective measures implemented in the action plans. In this paper, available results fromnumerous European agglomerations (with particular emphasis on Spanish agglomerations) are compared and analysed. The impact and its evolution are based on the percentage of people exposed to noise. More specifically, it demonstrates the impact caused by road traffic, which proves to be the main noise source in all agglomerations. In many cases, the results are extremely remarkable. In some case, the results are illogical. For such cases, it can be concluded that either assessment methodologies have been signifi- cantly amended or the input variables to the calculation programs have been remarkably changed. The uncertainty associated with the results is such that, in our opinion, no conclusions can be drawn concerning the effectiveness of remedial measures designed within the action plans after the Directive’s first implementation Phase.

Effect of Pantograph and Bogie on Interior Noise of High-Speed Train in Tunnel

2013 ◽  
Vol 664 ◽  
pp. 191-196
Author(s):  
You Gang Xiao ◽  
Yu Shi
Keyword(s):  
High Speed ◽  
Sound Pressure ◽  
Broad Band ◽  
Pressure Level ◽  
Channel Noise ◽  
High Speed Train ◽  
Noise Sources ◽  
Vehicle Noise ◽  
Measurement And Analysis ◽  
Analysis System

For clarifying the noise in tunnel affected by pantograph and bogie, which are the most important noise sources, the noises near pantograph and bogie in a high-speed train were tested by multi-channel noise measurement and analysis system in tunnel, and compared with those measured outside the High-speed train and on an open field. The results show that the interior vehicle noise is spatially non-homogeneous in the whole carriage, the larger sound pressure level (SPL) near pantograph are next to ceiling, and near bogie next to floor. The noise spectra show a broad band feature, and dominated by the frequency contents among 100Hz-2kHz, so the countermeasures against noise should be within these range.

Measurement and Analysis of Noise Characteristics for Diesel Engine

2005 ◽  
Author(s):  
Guangpu Liu ◽  
Hongxia Pan ◽  
Jinying Huang
Keyword(s):  
Spectral Analysis ◽  
Diesel Engine ◽  
Noise Source ◽  
Low Noise ◽  
Coherence Analysis ◽  
Vehicle Interior ◽  
Noise Characteristics ◽  
Measurement And Analysis ◽  
Analysis System ◽  
Low Noise Design

The vehicle interior noise is mainly caused by irregularity of road, engine and transmission. So it is important to study on the noise characteristics for diesel engine and identify the main noise source and investigate the effective methods to control noise. In this paper, by using the measurement and analysis system, we measured the sound pressures levels and their curves the noise of a military diesel engine, then made spectral analysis and coherence analysis. The results provide bases for low noise design of this diesel engine.

Mapping Heavy Vehicle Noise Source Heights for Highway Noise Analysis

2017 ◽  
Author(s):  
Paul R. Donavan and Carrie J. Janello ◽  
◽  
◽  
Keyword(s):  
Noise Source ◽  
Noise Analysis ◽  
Heavy Vehicle ◽  
Vehicle Noise ◽  
Highway Noise

Work Zone Coordination Software Tool

2017 ◽  
Vol 2617 (1) ◽  
pp. 60-70 ◽  
Author(s):  
Bekir Bartin ◽  
Kaan Ozbay ◽  
Matthew D. Maggio ◽  
Hao Wang
Keyword(s):  
New Jersey ◽  
Construction Projects ◽  
Software Tool ◽  
Work Zone ◽  
Department Of Transportation ◽  
Work Zones ◽  
Web Based ◽  
Departments Of Transportation ◽  
Transportation Agencies

Faced with a growing number of work zones, transportation agencies are being challenged to effectively manage the impacts of these zones, alleviate congestion, and maintain the safety of motorists and workers without disrupting project schedules. Coordinating work zones has already been practiced by various state departments of transportation and transportation agencies, yet there are no universal department of transportation policies that address how agencies should coordinate or consolidate projects. In addition, only a few states utilize computer tools specific to regional or corridor-based work zone coordination. State departments of transportation mostly coordinate significant and long-term projects. However, the majority of roadway projects include minor repair, roadway maintenance, bridge maintenance, surveying, and landscape and utility work that require relatively short-term work zones. The Work Zone Coordination Software tool was developed to provide the New Jersey Department of Transportation with an easy-to-use tool to evaluate the feasibility and effectiveness of coordinating short- and long-term work zones and to measure the benefits. This online tool is implemented with a web-based user interface. It integrates all scheduled and active construction projects, identifies conflicts between work zone projects, and estimates the benefits of conflict mitigation. The Work Zone Coordination Software tool works with the New Jersey work zone database by automatically importing data to provide up-to-date information to its users. However, the tool is built on a flexible framework that allows the integration of any work zone database provided that it includes all the required information.

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