traffic air pollution Articles
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A Bayesian model for studying urban air pollution and respiratory symptoms in children
The association between traffic–related air pollution and long–term respiratory health problems has been extensively studied. In this work we evaluated the effect of traffic–related air pollution on respiratory symptoms in children living in Florence, Italy. Children were selected from different schools part of the Italian Studies on Respiratory Disorders in Children and the Environment 2. ...
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Assessing Spatial Variability of Ambient Nitrogen Dioxide in Montreal, Canada, with a Land-Use Regression Model
The purpose of this study was to derive a land-use regression model to estimate on a geographical basis ambient concentrations of nitrogen dioxide (NO2) in Montreal, Quebec, Canada. These estimates of concentrations of NO2 will be subsequently used to assess exposure in epidemiologic studies on the health effects of traffic-related air ...
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Air pollution at street level in European cities
Traffic-related air pollution is still one of the most pressing problems in urban areas. Evidence of the adverse health effects of fine particulate matter is continuously emerging and it is alarming that most of the traffic-related emissions are in the fine particulates range (< PM2.5). Human exposure to increased pollutant concentrations in densely populated urban areas is high. The improvement ...
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ADMS-Urban: an air quality management system for traffic, domestic and industrial pollution
The new version of the Atmospheric Dispersion Modelling System for urban environments, ADMS-Urban, is based on the same up-to-date physics as the ADMS model, outlined briefly here in Section 2. The basic model has been the subject of extensive validation studies: as part of this series of European Harmonisation Workshops; sponsored by HMIP (Her Majesty's Inspectorate of Pollution, now part of the ...
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Simple modelling approaches to assess the impact of traffic air pollution: Cordoba case study
From 1991 to 1999, there were significant commitments to environmental protection in Argentina. During this period, several important cities of the country, such as Buenos Aires, Cordoba, Mendoza, Bahia Blanca, and Ushuaia, began air quality monitoring programmes. Among these cities, we have taken Cordoba as a case study because of the existence of a continuous monitoring campaign that collected ...
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Using a calculation model to prevent serious air pollution from traffic
The municipality of Utrecht has ten years of experience with exceeding the pollution limit values for NO2 and benzene, and offering advice for traffic plans on the effects of air pollution. Utrecht promotes prevention and integration of environmental issues in traffic plans and town planning. Utrecht has widened the use of the Dutch air pollution model for traffic (CAR) to prevent new exceeding ...
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Gravity driven membrane filtration system to improve the water quality in rainwater tanks
The characterisation of rainwater in metropolitan Sydney and in rural New South Wales was undertaken. The results showed that factors such as the lack of vehicular traffic, air pollution and urban contamination meant that rural rainwater water quality was better. The rain water collected in both metropolitan and rural areas generally complied with the 2004 Australian Drinking Water Guidelines ...
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Project - Vertical Drain Installation for Dhaka MRT Line-6
CeTeau completed soil improvement for the Dhaka Mass Rapid Transit Development project in Bangladesh. The works were part of the Dhaka Metro Rail Line-6, which will provide a 20 km Metro Rail system for Dhaka, the capital of Bangladesh, which is one of the most highly populated and traffic congested cities in the world. The project will reduce traffic congestion and improve air pollution in the ...
By CeTeau B.V.
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Bicycles pedaling into the spotlight
The world produced an estimated 130 million bicycles in 2007—more than twice the 52 million cars produced. Bicycle and car production tracked each other closely in the mid-to-late 1960s, but bike output separated sharply from that of cars in 1970, beginning its steep climb to 105 million in 1988. Following a slowdown between 1989 and 2001, bike production has regained steam, increasing in each of ...
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The Bright Side of the Megacity
Writing in Foreign Policy, journalist Jonathan Kalan argues that the media, environmentalists and non-governmental organizations focus too much on problems in the world’s megacities (cities where the population is greater than 10 million), such as air pollution and traffic. “Megacities hold enormous value for the developing world,” Kalan writes, “and ensuring that they ...
By Ensia
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Vehicle wake factor for heterogeneous traffic in urban environments
Vehicles' 'wakes' are generated as a result of vehicular movements. They are one of the dominant factors in dispersing the pollutants in 'calm' meteorological conditions when wind velocity is Keywords: calm meteorological conditions, heterogeneous traffic, line source models, traffic generated turbulence, urban hotspots, vehicle wakes, wind speed correction factor, wind turbulence, urban ...
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Environmental and resource constraints on Asian urban travel
In industrialising countries, personal income has been the main constraint on widespread car ownership. However, incomes are rising rapidly in many Asian cities, so that traffic congestion and air pollution are replacing income as barriers to higher car ownership. Global oil depletion and climate change are potential additional constraints. The main finding of this paper is that private car ...
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Research Note: Air pollution challenges and solutions for China's urban transportation development
China has experienced dramatic urbanisation and motorisation in the past 20 years. The phenomenal rise in the vehicle population in major cities has resulted in increased air pollution, traffic congestion and other 'wicked problems'. The Chinese government at all levels has made significant effort to control motor vehicle emissions, but vehicle population growth far outpaces their efforts, ...
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Hourly NOx concentrations and wind direction in the vicinity of a street intersection
This study relates NOxconcentrations and wind (speed and direction) measured inside an asymmetric street canyon, with ambient wind. The monitoring site is located near a street intersection. The wind measured at the domestic airport located in the city, near the coast, has been considered as ambient wind. Wind direction at the monitoring site inside the canyon is mainly from the E, NE, W and NW ...
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Lisbon air quality: evaluating traffic hot-spots
This paper presents an air quality study in an urban traffic hot-spot in Lisbon, Portugal, by comparing the atmospheric pollutant concentrations obtained by a numerical model with measured values. Results indicate that the mean variation of particle and gaseous concentrations followed the traffic flow rate, evidencing the occurrence of PM10 concentrations greater than the respective air quality ...
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Experiences in the modelling of traffic policy measures for ambient air quality management in Lithuania
This paper presents the application of the Integrated Transport Effect Modelling System (ITEMS) in the city of Kaunas, Lithuania, taking into consideration some factors such as existing vehicle fleet, traffic flows, and ambient air quality monitoring data. The objective of this study is to estimate the exhausts of CO, NOx, and SO2 released by motor vehicles in relation to predictive traffic ...
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Daily variation of traffic emissions in Athens, Greece
In this work, the emissions of four pollutants (CO, Benzene, NOx and PM10) during a working day were estimated and presented in main avenues of Athens, Greece with the aid of the COPERT methodology. The data used as input to the COPERT III was collected through a measuring campaign every 15 min and lane for the time period 07.30-17.30 of a weekday. The results revealed the CO, Benzene, NOx and ...
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Update and revision of Turkish air quality regulation
The Air Quality Assurance Regulation (AQAR) was issued on October 1986. This regulation was basically a direct translation of the German TA-Luft of 1984. The main purpose of AQAR was to control the effect of industry, domestic heating and Traffic on ambient air quality which previously had not adequately been represented. Two new regulations, "Industry Related Air Pollution Control Regulation" ...
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WORM: A new open road line source model for low wind speed conditions
Emission from road traffic constitutes one of the most important sources of air pollution in urban areas. This paper describes a newly developed air pollution dispersion model for open roads and highways called WORM (Weak Wind Open Road Model), and give some results using this model at Nordbysletta, Norway, in the period 1 January 200215 April 2002. Generally, a good correspondence was found ...
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Air pollution dispersion inside a street canyon of Gottinger Strasse (Hannover, Germany): new results of the analysis of full scale data
This study analyses the interactions between pollutant concentrations inside a street canyon, and wind and traffic dispersive air motions. Air pollutant concentrations, meteorological parameters and traffic flow continuously measured in Gottinger Strasse (Hannover, Germany) were used in calculations. Parameters included in the inverse proportionality between concentration and a dispersive ...
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