In the theory of traffic flows the main characteristics are: intensity, speed, and density.  They make it possible to use hydrodynamic models. In connection with the development of modern highways and road networks, traffic flows behavior is becoming more and more complex and diverse. In particular, the B.Kerner studies have shown that the laminar solution of hydrodynamic models is poorly corre...

conclusions the findings of the current study will be beneficial in prevention of rtcs and its associated complications and hence will be vital for policy makers, health service managers and stakeholders. context despite considerable attention given to health statistics of road traffic crashes (rtcs), the epidemiological aspects of injuries resulting from rtcs are not fully understood in iran a...

objective: road traffic injuries (rtis) are the second leading causes of death in iran. one of the most important steps in the prevention of traffic-related trauma and its consequences is gaining insight into the epidemiology of injuries. we conducted this study to describe the characteristics of rtis and to find strategies for its prevention. methods: this was a prospective cross-sectional stu...

background: more than 20% of deaths from traffic crashes are related to pedestrians. this figure in tehran, the capital of iran, reaches to 40%. this study aimed to determine the high-risk areas and spatially analyze the traffic crashes, causing death to pedestrians in tehran.   methods: mapping was used to display the distribution of the crashes. determining the distribution pattern of crashes...

frustrating situations that impede or prevent some form of ongoing goal-directed behavior are believed to act as a catalyst for aggressive behavior. from social learning approaches aggression is a learned response through observation or imitation of socially relevant others. many psychological factors are at play in aggressive driving and many may prove difficult to control. human beings are na...

sleep deprivation is a condition of not having enough sleep it can be either chronic or acute. a chronic sleep-restricted state can cause fatigue. fatigue is a subjective state related to sleep deprivation, the more someone is deprived of sleep the more likely that person is to be fatigued. several studies indicated that drowsiness/fatigue can affect steering performance and speed control. rese...

open fx is one of most serious injury in motor car accident. infection /osteomyelitis/amputation and frequent admission in hospital and iv antibiotic and surgery are common complication of this problem. life saving limb saving prior to the other practice. take a photo by cell phone then call for help and cover the wound /control of bleeding and keep person warm is principles to management for o...