Traffic noise

Top PDF Traffic noise:

Traffic Noise – A Health Stressor for Mankind

Traffic Noise – A Health Stressor for Mankind

Logical proof has recommended that chronic aircraft machine noise presentation may debilitate understanding perception and long haul memory among kids though high noise level of modern settings is exposed to queasiness, migraines, contentiousness and regulation of mind-set and uneasiness [Figure 2]. Epidemiological thinks about have indicated that unpredictable traffic noise of 45 dBA has been interlinked to the obstruction of day by day exercises, dozing, rest, study, imparting, and unfriendly wellbeing suggestions, for example, dissatisfaction, lower resistance, and changes of blood pieces. In particular, road traffic irritation is a significant offender with revealed negative side effects of hearing misfortune, gastric discharge, pituitary and adrenal organ incitement, concealment of the resistant reaction, and female proliferation and ripeness disappointments. Logical confirmations have recommended that these intelligent effects of numerous noises indicated more prominent impacts than basically adding the individual stressors, with incessant thoughtful excitement or conditions of defenselessness.
Show more

6 Read more

The Effectiveness of The Green Carrier as a Traffic Noise Barrier

The Effectiveness of The Green Carrier as a Traffic Noise Barrier

The absorption coefficient of the real material is measured and compared with the material used in the model. A scale model of 1:5 is adopted as the results of limitations of space, equipment and material. The absorption coefficient of the real material and scale model is measured in a standing wave apparatus (B&K type 4002). The results of the measured are shown in the Table[1].A scale model barrier is erected in the anechoic chamber made of plywood and extended inside the wedges of the chamber to avoid any unwanted paths and to ensure the sound reaches the microphone after being diffracted from the barrier. The height of the model barrier is representing a 2.8 m height Figure [5], and the traffic noise is simulated by 6 small tweeters of 50 mm diameter connected to a sound source (B&K Type 4205) propagated white noise in the frequency range (200-60,000) Hz. The signal is picked by a ½ inch microphone (B&K type 165) and which is connected to building acoustics analyzer (B&K type 4418) in one-meter steps from the barrier.
Show more

8 Read more

Assessment of Traffic Noise in Guwahati City, India

Assessment of Traffic Noise in Guwahati City, India

Most alarming situation is with high noise levels in the silence zone of the city. According to “The Noise Pollution (Regulation and Control) Rules, 2000, the silence zone is an area comprising not less than 100 meters around hospitals and educational institutions. But from this study, it has been found that most of the hospitals, Nursing homes and educational institutions are established in either commercial places or nearby heavy traffic plying roads. Consequently, most of the hospitals, Nursing homes and educational institution premises are in the grip of higher traffic noise levels than the prescribed noise standards of 50 dB (A) and they are not safe from noise induced disturbances.
Show more

5 Read more

A Study of Noise & Development of Traffic Noise Annoyance Models

A Study of Noise & Development of Traffic Noise Annoyance Models

equivalent traffic noise and traffic volume have been developed on the basis of traffic noise survey, residents’ perception survey and traffic volume survey. The surveys have been conducted at six study area locations in Delhi. But the data and developed model of one location i.e. Soami Nagar is discussed in the paper. The resi- dents’ perception has been recorded in terms of their degree of annoyance with respect to noise levels. There are five verbal scale degree of annoyance recorded viz. “tolerable (1)”, “slightly intolerable (2)”, “intolerable (3)”, “very intolerable (4)” and “extremely intolerable (5)”. After conduct of primary surveys data has been analyzed for equivalent traffic noise levels, traffic volume & its composition, residents’ perception on traffic noise in terms of degree of annoyance. The equivalent noise levels and corresponding residents’ perception have been determined with respect to five time bands in a day. The time bands have been divided based on temporal varia- tion of traffic and time duration suggested by MoEF (The Ministry of Environment & Forests) for day and night. The present study was undertaken in 2011, at New Delhi, capital of India. The 24 hour traffic volume survey and noise measurement survey are conducted at Soami Nagar, New Delhi and thereafter resident’s perception data has been collected by interviewing of 62 households for different five time bands.
Show more

6 Read more

Application of GIS in Urban Traffic Noise Pollution

Application of GIS in Urban Traffic Noise Pollution

Processed data, spatial analysis and models are loosely-integrated within the framework of the GIS project, enabling urban authorities to address environmental protection issues. Such configuration allows subsystems to operate independently of each other, and to have data sharing transparent to the end- user. An ordinary co-kriging is performed to estimate the noise magnitudes and map the noise levels. Co- kriging is a moderately quick interpolator that can be exact or smoothed depending on the measurement error model. Co-kriging also provides standard errors of the predictions. This research indicated that the upward and downward movements of heavy vehicles result in statistically similar noise levels. The reason was assigned to the study area’s slight slopes. Li and his collogues developed an integrated GIS traffic noise
Show more

6 Read more

Assessment of Traffic Noise In Hyderabad City, India

Assessment of Traffic Noise In Hyderabad City, India

Noise is one of the most significant sources of environmental pollution in modern cities. It can be defined as an unpleasant and unwanted sound, which now becomes a serious threat to urban life. Noise is like a physical form of pollutants which does not harm directly to the life supporting system namely air, water and soil. But its effects are more directly on the receiver i.e. human being 1 . The major cause of increasing noise is rapid urbanization, industrialization and population growth. Most of the Indian cities and towns like Visakhapatnam, Kolhapur, Asansole and Balasore have also been facing serious traffic noise pollution in last few decades due to substantial growth of new vehicles, low turnover of old vehicles, inadequate road network and urbanization 2,3,4,5 . Assessment of traffic noise level is difficult in Indian cities due to the heterogeneity in traffic and environmental conditions e.g., mixed traffic, congestion, road conditions, frequent honking and lack of traffic sense 6,7 . Therefore, it is important to consider such diverse factors in monitoring and assessment of traffic noise level in the Indian context. Various studies carried out in India have shown that most of the cities are under the grip of high noise level than the standards prescribed by CPCB and MoEF 8,9 . The main objective of the present study is to assess the noise levels of Hyderabad city at various locations, i.e. commercial zones, residential zones and silence zones particularly educational institutions, hospitals and nursing homes, due to vehicular traffic under heterogenic traffic conditions. For this purpose, classified traffic volume and noise level are measured at different zones on roadways. In this study, traffic volume is categorized in 2-wheelers, 3- wheelers, 4-wheelers and 6-wheelers & above. Noise levels are measured for Leq, Lmin, Lmax, L10, L50 and L90. The terms Leq, Lmin, Lmax, L10, L50 and L90 are define as below.
Show more

11 Read more

PEDESTRIAN RESPONSE TO ROAD TRAFFIC NOISE FOR MEDIUM SIZE CITY IN INDIA

PEDESTRIAN RESPONSE TO ROAD TRAFFIC NOISE FOR MEDIUM SIZE CITY IN INDIA

Abstract: Level of vehicular noise pollution is one of the major factors to choose pedestrian mode of transportation among other modes of transportation. Transportation systems and their related outcomes are responsible for ensuring safe travel options, including walking people of all ages and different abilities. This study will provide an opportunity to quantify the environmental impact in terms of noise level for future development and planning of pedestrian infrastructure in India. It will also help in modal shifting towards walking, improvements in energy efficiency, and the impact of specific contaminants on health. Exposure of high noise level can cause annoyance and severe stress on auditory and nervous system of pedestrians. Most of the Indian cities have noise level above than acceptable limits because of rapid urbanization with increasing number of vehicular traffic. The objective of this study is to study response of pedestrians towards noise pollution in Roorkee at different locations based on different land use. Roorkee is a medium size city with a population of 2.73 lakhs (Roorkee Metropolitan areas, 2011 census), situated in Uttarakhand, India. It is a city with large number of educational institutions and sizable numbers of student population. Noise level study has been carried out at ten locations on NH-58 near Indian Institute of Technology Roorkee. Noise data was collected at an interval of 30 seconds. Design implications for future improvement of pedestrian infrastructure have been presented in this paper considering traffic noise as an environmental factor. It is expected that the study outcome shall be useful in understanding positive effect of low traffic noise encouraging increased usage of pedestrian facilities within urban transport network.
Show more

8 Read more

Assessment of Traffic Noise In Hyderabad City, India

Assessment of Traffic Noise In Hyderabad City, India

Noise is one of the most significant sources of environmental pollution in modern cities. It can be defined as an unpleasant and unwanted sound, which now becomes a serious threat to urban life. Noise is like a physical form of pollutants which does not harm directly to the life supporting system namely air, water and soil. But its effects are more directly on the receiver i.e. human being 1 . The major cause of increasing noise is rapid urbanization, industrialization and population growth. Most of the Indian cities and towns like Visakhapatnam, Kolhapur, Asansole and Balasore have also been facing serious traffic noise pollution in last few decades due to substantial growth of new vehicles, low turnover of old vehicles, inadequate road network and urbanization 2,3,4,5 . Assessment of traffic noise level is difficult in Indian cities due to the heterogeneity in traffic and environmental conditions e.g., mixed traffic, congestion, road conditions, frequent honking and lack of traffic sense 6,7 . Therefore, it is important to consider such diverse factors in monitoring and assessment of traffic noise level in the Indian context. Various studies carried out in India have shown that most of the cities are under the grip of high noise level than the standards prescribed by CPCB and MoEF 8,9 . The main objective of the present study is to assess the noise levels of Hyderabad city at various locations, i.e. commercial zones, residential zones and silence zones particularly educational institutions, hospitals and nursing homes, due to vehicular traffic under heterogenic traffic conditions. For this purpose, classified traffic volume and noise level are measured at different zones on roadways. In this study, traffic volume is categorized in 2-wheelers, 3- wheelers, 4-wheelers and 6-wheelers & above. Noise levels are measured for Leq, Lmin, Lmax, L10, L50 and L90. The terms Leq, Lmin, Lmax, L10, L50 and L90 are define as below.
Show more

11 Read more

Modelling Of Road Traffic Noise

Modelling Of Road Traffic Noise

Vehicular noise is one of the most prevalent forms of pollution. Traffic noise annoyance has become a major issue with the advent of fossil fuels and development in vehicle technology. Vehicular noise is dramatically increasing with the increased number of vehicle population, especially due to speeding vehicles. Amongst all the sources of noise pollution, vehicular noise has been identified as the most annoying and health impairing one. Therefore, it had become important to check the traffic noise and enhance the environmental condition along the transportation corridor. This study attempts the development of road traffic noise model for Indian condition. A statistical regression model for predicting road traffic noise is developed based on A-weighted equivalent noise levels.
Show more

6 Read more

Benefit measures for noise abatement: calculations for road and rail traffic noise

Benefit measures for noise abatement: calculations for road and rail traffic noise

Monetary values act as this common metric and in this paper we estimate monetary values for road- and rail-traffic noise abatement. These two noise sources are of differ- ent character and it is well established that the annoyance from noise individuals report differs between the two modes of transport [41]. The origin of this paper was a recent revision of the official monetary benefit measures of noise abatement, from now on the “ASEK values”, 1 carried out in Sweden [65]. The original values were revised to take into account general price increases and an increase in real growth. It was also decided that the original values should be adjusted upwards since it was assumed they they did not reflect the total social cost, but were missing the social cost of health effects from noise exposure [65]. This revision drew to the attention the potential need for a more com- prehensive revision due to the fact that the values for all transport modes were based (after also other sources had been taken into consideration) on estimates from a study in which the effect on property prices from road noise was examined [63, 71].
Show more

14 Read more

A model for Traffic noise prediction in heterogeneous traffic conditions

A model for Traffic noise prediction in heterogeneous traffic conditions

Earlier traffic noise levels in a few Indian cities have been reported by previous researches [Pancholy, et al 1969, Bose and Bhattacharyya 1973]. In recent years the studies reported are due to Gupta et al 1986, Rao and Rao, 1991, Chakrabarty 1997 etc. In these studies regression equations have been reported for predicting the traffic noise levels by considering traffic flow and speed. Some studies (Kumar and Jain 1994, Nirjar 2003, Agarwal et. al 2009 and Agarwal and swami 2010) also dealt with heterogeneous traffic conditions and arrived at some correction values for mixed traffic flow. Though these studies have been reported about this noise the applicability of these models in the present urban context is not straight forward. Especially the establishment of the base noise level which should also include predominant sources such as honking noise by vehicle horns may have to be considered even while considering continuous flow. The work presented considers a procedure for predicting the noise levels of heterogeneous traffic conditions by considering base ISSN: 0975-833X
Show more

5 Read more

Road traffic noise and children’s inattention

Road traffic noise and children’s inattention

Most studies on noise exposure and children’s cogni- tion have focused noise exposure at school, particularly noise from aircraft. Only a few studies have examined the possible impact of road traffic noise at home on chil- dren’s cognition. There are different exposure windows in which road traffic noise might impact on inattention, including short-term, long-term or pregnancy periods. First, the effect of road traffic noise might be short-term or instantaneous, for example through its impact on last night’s sleep or by direct interference with communica- tion, increased arousal and annoyance, [3, 23]. The lim- ited literature that exists on noise and children’s sleep suggests a link between increased road traffic noise and sleep disturbances, such as sleep duration, sleep quality and daytime sleepiness [12–14]. Sleep reinvigorates and is important for being alert [24], and impaired sleep has been associated with both behavioral reports and neuro- psychological tests of inattention [25–27], although some studies have found no associations [28]. Impaired sleep is also found more often in children with attention deficit/hyperactivity disorder (ADHD), compared to chil- dren without ADHD [29]. Studies have indicated that interventions to improve sleep reduce attention deficit symptoms in children with ADHD [30, 31].
Show more

14 Read more

REVIEW ON ROAD TRAFFIC NOISE POLLUTION

REVIEW ON ROAD TRAFFIC NOISE POLLUTION

Nowadays transportation noise becomes a major problem. There are some noises sources like motor-cycle, bus, trains, aero planes and cars. Road traffic has been the major source of annoyance. It is due to the large number of automotive vehicle in comparison with other machines. The mechanism of radiation of noise to outside from a vehicle has been different from the generation of noise inside the vehicle. The noise pass off depends on the relative levels, characteristics and the interaction of the directly spread noises from the vehicles. The most important noise source of the vehicles is the engine and its accessories. According to WHO the most important effects regarding traffic noise are: psychological & physiological effects, work-related stress and increased risk of accidents. Environmental noise caused by traffic, industrial and recreational activities as their main local environmental problem especially in urban areas. It has been estimated that around 20 present of inhabitants in Indian suffer from noise levels that health experts consider to be insufferable, where most people become irritated. The same survey showed a significant rise in the public's willingness to take action to reduce noise.
Show more

6 Read more

Effect of Road Traffic Noise Pollution in Cuddalore Town: A Case Study

Effect of Road Traffic Noise Pollution in Cuddalore Town: A Case Study

59-85 dB (A) It was also observed that higher noise level in the town is due to rapid and unplanned urbanization resulting in great influx of people from all parts of the region and country, improper management of town roads and traffics, lack of sufficient parking spaces and exponential growth of both private and public vehicles in the city. This research study is based on the expected relationship between traffic noise and its effect on human work efficiency in his/her respective working places. From the survey and findings it is evident that road traffic noise affects human work efficiency at Government Offices, Private Organizations, and Commercial Business Centers beside the busy main roads. Noise is undesirable or unwanted sound. Extended exposure to excessive sound has been proved to produce physical and psychological damage. Because of its annoyance and disturbance implications, noise adds to mental stress and hence affects the general well being of those exposed to it. Noise is a major source of friction among individuals. The results of this study show that the level of noise pollution in Cuddalore town far exceeds the acceptable limits set by the CPCB. Even in the residential areas and vulnerable institutions like schools and hospitals, noise level is much higher than the acceptable limit. This has serious implication on the general health and well-being of the inhabitants of the city. It is also observed .that noise level is closely related with the number of motor vehicles. Urgent measures should be taken to control the level of noise pollution in the town. To reduce noise pollution, several measures can be implemented which include proper maintenance of vehicle and roadway, plantation of trees and construction of sound barriers. Noise pollution is becoming a major public health concern with all of its potential biological and social effects on the body such as cardiovascular, hearing, performance at school and at work, and psychological. This is an especially concerning area for children who are experiencing hearing loss at younger ages that may ultimately affect their learning. These children may be at risk for performing poorly in school and in turn will affect their future career potential. The cardiovascular effects on children may also lead to chronic illness in adulthood.
Show more

12 Read more

STUDY AND ASSESSMENT OF TRAFFIC NOISE IN AMRAVATI CITY

STUDY AND ASSESSMENT OF TRAFFIC NOISE IN AMRAVATI CITY

iii. The noise pollution level (LNP) is found to 72.57 to 91.14 dB (A) Irwin square LNP is more which is harmful as the main Government Hospital and Holy Cross Convent School is nearer to this junction which may affect the health and performance of the student. iv. Traffic noise Index (TNI) is found to be 68.8 dB (A) to 107.8 dB (A)

5 Read more

Efficient Road Traffic Noise Model for Generating Noise Levels in Indian Scenario

Efficient Road Traffic Noise Model for Generating Noise Levels in Indian Scenario

The two models been discussed above pay high emphasis over the percentage of heavy vehicles and consider it to be major cause of the generation of noise. Thus, considering this aspect the volume of heavy vehicles should be reduced across the public areas and alternate path should be provided to route them. Besides this while analysing the noise levels along certain silence areas such as schools, hospitals the speed limita should be fixed to minimise the possibility of traffic jams occurring in that area. It could also help in setting up of official buildings along the areas of low traffic noise by prior analysis of the noise levels using the RTM (Road Traffic Model). The most important application of the generation of noise levels is that the generated noise levels can be put up as an input across certain prediction algorithms in order to obtain the values of noise which would get generated in the future. This could prove advantageous as the results of prediction could be used up in analysing the levels of noise in future with the data available at present and take necessary measures to curb it. It could be possible to obtain the levels of noise just by observing the present traffic conditions. This data could be used variety of organizations for generating the noise levels reports for solving variety of purposes.
Show more

5 Read more

Artificial neural network for traffic noise modeling

Artificial neural network for traffic noise modeling

Noise is one of the most prevalent sources of environmental pollution, and vehicular traffic noise is considered one of the most invasive type of pollution and often the most intrusive of all. The trend of noise pollution modelling varies from the smart result of classic regressive models to the performance of many assessment models based on mathematical expression, genetic algorithms and neural networks. In this study, multilayer feed forward back propagation neural network has been developed to predict vehicular traffic noise in urban area. The proposed ANN model has been used to predict the equivalent continuous sound level (Led) in dB (A). The model input parameters are the characteristics of the vehicular traffic flows (total vehicle, percentage of heavy vehicles and average vehicle speed) and the typology of the roads (width of the roadway). The predicted Led from neural network approach and the regression analysis have also compared with the filed measurement. The results show how the neural network approach provides better performance than the classical solution based on statistical analysis.
Show more

7 Read more

Analysis Of Road Traffic Noise At Express Highway

Analysis Of Road Traffic Noise At Express Highway

In the present work, an attempt was made for comprehensive study of traffic noise on highway at and around the Amravati city during morning, afternoon, and evening during 2014 - 2015. The traffic noise was measured about 3 different Spots along the Express Highway. The minimum and maximum noises level observed were 52.9 dB and maximum 104.5 dB. The sources of noise pollution were motor vehicular traffic. It is noticed that none of the vehicle generated sound within the prescribed limits i.e. 70 dB during the study period. The control measures should be adopted to minimize the noise level; the government also has a great role to play in this regard.
Show more

7 Read more

Effects of Vechicles Velocity in Traffic Noise in Highway

Effects of Vechicles Velocity in Traffic Noise in Highway

Different models are presented for noise pollution calculation. Each of these models evaluated and are precise. Their differences are their parameters that they use for their calculations. There is one standard method that is used by United States and many countries use this method as their standard model. It is called FHWA and it is become popular among other standard models. Jao et al presented a model for non-straight roads. They modified FWA model and change some of its parameters to predict sound level in non-straight roads [1]. Some researchers, related pavement conditions to noise pollution and made a model to determine sound level of the area [2]. Also, role of porous asphalt in noise emission is considered [3]. Watts, et al. [4] conducted a comparison between sound barriers and porous asphalt effects in noise level of the area and applied a correction parameter to mathematical models of noise calculations [4].
Show more

6 Read more

Genesis of Road Traffic Noise on Human Health

Genesis of Road Traffic Noise on Human Health

Urbanization, monetary development and mechanized transport are a portion of the main thrusts for natural pollution presentation and wellbeing impacts. Noise pollution is a disappointing human, creature or machine-made sound that aggravates the action or adjust of human and creature life. Vadodara is the third biggest city of Gujarat after Surat and Ahmadabad having assessed populace of 18 lakhs. Because of increment populace and industrialization, the transportation in the city expanded to unimaginable statures. The expanded vehicular numbers on existing roads has significantly pushed activity to make pollution that antagonistically influences the individual and living animals. In India, the Pollution (Regulation and Control) Rules, 2000 have been encompassed under the Environment (Protection) Act, 1986. These are a course of action of tenets for direction and control of pollution. In 1999, WHO outlined the logical proof on the unsafe effects of pollution on wellbeing and made proposals on rule esteems to secure general wellbeing in its Guidelines for group noise. Constant introduction of human body with abnormal state of group noise may prompt anxious, hormonal, and vascular move that have sweeping outcomes (Singh and Davar 2004). Thinks about showing a causal pathway that straightforwardly interface noise (at biological levels) and irritated lay down with cardiovascular infection and additionally other long-haul wellbeing results are as yet missing (Hume, Mark Brink, Mathias Basner 2012). Bothered rest has additionally been related with expanded recurrence of savage goes about and in addition abusive behavior at home, work and vehicle accidents, expanded work non-attendance (Cappuccio 2010). The watched relationship between poor rest and corpulence, diabetes, despondency, forceful and reprobate practices concern youngsters and teenagers, as well (Chen X 2008). Ecological pollution, especially that caused by transportation implies, is a developing issue in our cutting edge urban areas. It is viewed as a noteworthy reason for exogenous rest aggravations, after physical professional blames and day strains (Basner M 2011).
Show more

6 Read more

Show all 10000 documents...