نتایج جستجو برای: traffic effects

تعداد نتایج: 1635368  

2009
Lennart Bråbäck Bertil Forsberg

The aim of this review was to assess the evidence from recent prospective studies that long-term traffic pollution could contribute to the development of asthma-like symptoms and allergic sensitization in children. We have reviewed cohort studies published since 2002 and found in PubMed in Oct 2008. In all, 13 papers based on data from 9 cohorts have evaluated the relationship between traffic e...

2003
Trang Dinh Dang

An alternative but very promising approach of traffic modeling is the use of fractal characterization to describe the high variability and bursty nature of network traffic. The aim of this dissertation is to contribute to this research approach, more precisely, to solve some problems in statistical testing, traffic characterization, modeling, and performance evaluation. First, the implications ...

2015
Linda Pfeiffer Georg Valtin Nicholas Hugo Müller Paul Rosenthal

The StayCentered Project at Technische Universität Chemnitz aims for assisting air traffic controllers in stressful traffic situations. Therefore we are seeking to comprehend air traffic controllers’ principles of operation within the dyadic team structure. First exploratory research revealed insights into air traffic controllers’ practices, their information processing (mental models), potenti...

Traffic flow systems are nonlinear and uncertain, so it is very difficult to find their optimal points. In traditional traffic control systems, the traffic lights of crossings change in a fixed time period that is not optimal. On the other hand, most proposed systems are sufficiently capable of coping with the uncertainties of traffic flow. To solve this problem, there is a need to develop expe...

Due to delay in receiving emergency medical services, a high number of injured people and patients annually lose their lives. Determining the medical service area and correct routing of rescuing operation is influential on the reduction of rescuers’ response time. Changing the traffic flow leads to change of medical service area. Therefore, it is expected that by observing changing traffic, the...

2010
Thorsten Neumann

Traffic and mobility are important ingredients of our daily lives. However, as for road traffic, people and environment are suffering from inefficiency, air pollution and noise, for example. Especially in urban areas, the problems are quite obvious. That is why national and local authorities are (re-)discovering traffic management as an integrated component of traffic planning and control to ov...

2011
Bert De Coensel Dick Botteldooren

Coordinated traffic lights that implement green waves along major arterial roads are an increasingly used traffic management strategy for reducing travel times in urban context. The potential positive effect of this measure on emissions is often called upon as an additional support for its introduction. Although a smoother traffic flow will generally lead to lower air pollutant emissions, it wi...

2016
Xiaohua Zhao Jiahui Li Jianming Ma Jian Rong

Traffic control devices are one of the most significant factors affecting driving behavior. In China, there is a lack of installation guidelines or standards for traffic control devices in school zones. In addition, little research has been done to examine the effects of traffic control devices on driving behavior. Few guidelines have been established for implementing traffic control devices in...

Journal: :Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention 2009
P L Jacobsen F Racioppi H Rutter

OBJECTIVE To examine the impact of traffic on levels of walking and bicycling. METHOD Review of the literature of medical, public health, city planning, public administration and traffic engineering. RESULTS The real and perceived danger and discomfort imposed by traffic discourage walking and bicycling. Accurately or not, pedestrians and bicyclists judge injury risk and respond accordingly...

2008
Mathias Basner Eva-Maria Elmenhorst Hartmut Maass Uwe Müller Julia Quehl Martin Vejvoda

INTRODUCTION: It is a well known fact that noise annoyance depends on the traffic mode. Much less is known about differences in physiological effects, especially on combined effects. Therefore, we investigated the effects of air (AI), road (RO) and rail (RA) traffic noise on sleep in the AIRORA study. METHODS: 72 subjects (40 ± 13 years, 32 male) were polysomnographically investigated during 11...

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