pollution control is based on correctly measuring pollutant concentrations but, at the moment,the principal european cities only monitor pollution levels by means of a few fixed stations co-located inselected points of the urban layout far from hotspots and/or by means of meteorological prediction models offuture pollution. few cities integrate the information from both sources. the implementat...

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...

The complex and diverse urban road traffic environments make it difficult to accurately assess situations. This paper proposes a collaborative monitoring method for situational assessment during emergency events. is applied network mapped by geographic relations. When an event captured node in the network, awareness completed activation function. Then, Incidence matrix of constructed based on d...

– As a result of an extensive field trial in Frankfurt/Main, the urban traffic pattern is represented by a distribution of local entropy variables. This letter aims at reproducing this distribution by use of two arguments —a geometrical and a hierarchical one. A characteristic scaling relation for urban traffic is derived. Introduction: urban traffic patterns. – Vehicular traffic flow has for s...

In the last decades, due to the increasing car traffic and the limited capacity of urban networks, algorithms for traffic management and route guidance are becoming more and more important. GPS technology can be used for fleet monitoring in urban or suburban areas, from a central monitoring station and may provide useful information concerning the movement of all vehicles. Current route guidanc...

BACKGROUND To investigate air pollution effects during pregnancy or in the first weeks of life, models are needed that capture both the spatial and temporal variability of air pollution exposures. METHODS We developed a time-space exposure model for ambient NO2 concentrations in Bern, Switzerland. We used NO2 data from passive monitoring conducted between 1998 and 2009: 101 rural sites (24,49...

The use of traac monitoring techniques based on image processing algorithms for supervising urban vehicle ows could be very useful. Classical inductive loops can only compute traac density on a single lane but are unable to estimate, for example, the behaviour of the vehicle ow at a crossroad. In this paper a system that estimates the turning rates at an urban crossroad by processing the sequen...