A model is presented for assessing the effects of traffic safety measures, based on a breakdown of the process in underlying components of traffic safety (risk and consequence), and five (speed and conflict related) variables that influence these components, and are influenced by traffic safety measures. The relationships between measures, variables and components are modelled as coefficients. ...

Traffic assignment algorithms are used to determine possible use of paths between origin-destination pairs and predict traffic flow in network links. One of the main deficiencies of ordinary traffic assignment methods is that in most of them one measure (mostly travel time) is usually included in objective function and other effective performance measures in traffic assignment are not considere...

Pavement rehabilitation could affect the accident severity index (ASI) since restoration measures means more safety for road users. No research or project has been carried out to identify hazard points to build a linear model based on crash severity index. One of the very popular accident severity index models used in all countries is based on linear models to rehabilitate pavements and this pa...

Filmed traffic conflicts were evaluated in terms of their severity using an objective measure and two subjective measures obtained from two groups of subjects. Each observer rated the same conflicts three times. Correlations among the subjective measures and between the subjective measures and the objective measure were used to evaluate some aspects of the reliability and validity of the subjec...

We introduce a family of heavy-traffic regimes for large-scale service systems, presenting a range of scalings that include both moderate and extreme heavy traffic, as compared to classical heavy traffic. The heavy-traffic regimes can be translated into capacity sizing rules that lead to economies-of-scales, so that the system utilization approaches 100% while congestion remains limited. We obt...

one of the leading causes of death and disability in the middle east is road traffic accidents. there are multiple factors that cause these traffic accidents, and the most important of which is fatigue, drowsiness and lack of concentration. the risk of road traffic accidents due to sleepiness, which were reported by police, increased by more than sevenfold in low alertness hours during circadia...