The city roads network is considered an essential element in any urban community. It occupies around 30% of the total area of urban land. These roads might be classified into two main parts:-Those which provide services to the lands attached.-Those which provide services to the cars; they are used by large-size vehicles. Though the first one is the most common one, the second one has recently been more influential in the planning of a city's roads network as a result of the increased use of high-speed comfortable low cost transportation. Statistics in many countries, including Iraq, have demonstrated that road accidents continue to be an outstanding danger to humankind, which is a problem that requires a study to the reasons behind it. The poor planning of the traffic networks including the traffic lights, the drivers' legal binding, the general level of education that both drivers and pedestrians have, and the correct choice of appropriate transportation suitable for all types of roads are only some examples. Due to the comprehensive nature of the study, it is useful to limit it to a very restricted part of the problem, though with great influence in the traffic process and planning, so this study is about traffic lights with lines and signs that have not received any attention in our country despite their low-cost execution.

Introduction: Youth violence is becoming a major unresolved public health problem. Risk factor of violence is anything that increases the probability that a young person will become violent; but no individual or group risk factors can be used to predict violence with any degree of certainty. Aim of the study: To determine the prevalence and investigate the predictors of violence among students of preparatory and secondary schools in Dubai. Methodology: A cross sectional study was designed with a sample size of 1054 students who were randomly selected from preparatory and secondary governmental and private schools in Dubai. Results: The prevalence of violence either in the form of beating against study students, witnessed or committed by the study students were 27.8%, 49.3% and 39.4% respectively. Clothes pulling, boxing, slapping or kicking constituted the common forms of beating. Among the non-physical forms of aggressive actions; stealing, insulting, spitting and circulating rumours were reported either committed or witnessed by the study students. Boys are highly likely more prone to indulge in rough and vulgar violence. Family condition, school environments and some habits like watching TV, playing computer games, practicing violent contact sports and smokers were found to be at more risk of being included in violent acts. Conclusion: Age, gender, family condition, school environment and some habits may contribute as risk factors for violence among preparatory and secondary school students. Recommendations: There is a need to seriously address violence as an important health issue in our schools given its magnitude. Application of a comprehensive anti-violence program is a must. For violence interventions to be effective they must focus beyond the violent child and the victim to include peers, school staff, parents and the community. This program can be integrated in the school health program.

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