BACKGROUND There are few data on the interaction between temperature and snow and rain precipitation, although they could interact in their effects on road traffic injuries. METHODS The integrated database of the Korea Road Traffic Authority was used to calculate the daily frequency of road traffic injuries in Seoul. Weather data included rain and snow precipitation, temperature, pressure, an...

Traffic congestion is usually observed at the upper streams of bottlenecks like tunnels. Congestion appears as stop-and-go waves and high density uniform flow. We perform simulations of traffic flow with a bottleneck using the coupled map optimal velocity model. The bottleneck is expressed as a road segment with speed reduction. The emergence of stop-andgo waves depends on the speed reduction i...

Stop and go traffic that leads to oscillate traffic flow frequently is observed on congestion flow. Unexpected reasons such as lane – changing maneuvers, lower speeds of leader vehicle and moving bottleneck cause stop and go traffic and amplifying delay and environment impacts. Stop and go traffic exactly can’t be modeled by traffic models, and also car following models based on kinematic flow ...

Background & Aims of the Study:  One of the most important harmful factors in big cities is noise, and traffic is regarded as the most important source of noise pollution. Therefore, this study aimed to investigate the level of knowledge, attitude, and practice of people in Kermanshah, Iran, regarding the potential effects of noise pollution on their health. Materials and Methods: A researc...

BACKGROUND Injuries and deaths from road traffic crashes are one of the main public health problems throughout the world. This study aimed to identify determinants of fatality traffic accident in Iran for the twenty-span year from 1991 to 2011. METHODS A time series analysis (1991-2011) was used to examine the effects of some of the key explanatory factors (GDP per capita, number of doctors p...