A distributed air pollutant dry deposition modeling system was developed with a geographic information system (GIS) to enhance the functionality of i-Tree Eco (i-Tree, 2011). With the developed system, temperature, leaf area index (LAI) and air pollutant concentration in a spatially distributed form can be estimated, and based on these and other input variables, dry deposition of carbon monoxid...

every year, a part of the national capital of the country is lost due to the disorders of traffic. an important part of the traffic disorders is caused by the improper behavior of some users of urban transport system. such a situation is contrary to the principles of smart growth and urban sustainability. the study of traffic conflicts as a symbol of the society culture of traffic can lead city...

Urban traffic analysis is crucial for traffic forecasting systems, urban planning and, more recently, various mobile and network applications. In this paper, we analyse urban traffic with network and statistical methods. Our analysis is based on one big bus dataset containing 45 million bus arrival samples in Helsinki. We mainly address following questions: 1. How can we identify the areas that...

Exposure to ultrafine particles (UFPs) from vehicle exhaust has been related to risk of cardiovascular and pulmonary disease and cancer, even though exposure assessment is difficult. We studied personal exposure in terms of number concentrations of UFPs in the breathing zone, using portable instruments in six 18-hr periods in 15 healthy nonsmoking subjects. Exposure contrasts of outdoor polluti...

This report documents results of a 10-month first phase of a study to characterize urban and rural particulate matter. The three main purposes of the study are 1) to assess the effects of street sweeping on urban air quality, 2) to measure and compare total and inhalable mass concentrations in a rural area, and 3) to determine the sources of urban and rural particulate matter and their relative...

The built environment surrounding arterials affects the dispersion of vehicular emissions in urban areas, modifying the potential risks to public health. In order to study the influence of urban morphometry on flow and dispersion of vehicular fine particulate matter emissions, in the summer of 2008 field measurements were performed in major arterials located in five Southern Californian cities ...