We present an analytical study of throughput measures in processor sharing queueing systems with randomly varying service rates, modelling a communication link in an integrated services network carrying prioritised stream traffic and elastic traffic. A number of distinct throughput measures for the elastic traffic are defined and analysed. In particular, the differences between the various thro...

Risk factors are generally defined and assigned to road networks, as constant measures in hazmat routing problems. In fact, they may be dynamic variables depending on traffic volume, weather and road condition, and drivers' behavior. In this research work, risk factors are defined as dynamic variables using the concept of chaos theory. The largest Lyapunov exponent is utilized to determine the ...

Road traffic injuries as a man-made calamity impose great burden on poor people and needs to be addressed through social justice and end of poverty. Pointing out that around 186,300 children under the age of 18 are killed every year, and much more are injured, urgent need to work on road safety measures will be revealed. Although preventing road traffic crashes from occurring should be the main...

OBJECTIVE To quantify the effects of increased cycling on both mortality and morbidity. DESIGN Health Impact Assessment. SETTING Cycling to place of work or education in Copenhagen, Denmark. POPULATION Effects were calculated based on the working-age population of Copenhagen. MAIN OUTCOME MEASURES The primary outcome measure was change in burden of disease (measured as disability-adjust...

OBJECTIVE To examine the association between drinking patterns and alcohol-related traffic casualties. STUDY DESIGN Data linkage of cross-sectional survey data on alcohol consumption with official traffic casualty records. METHODS Alcohol consumption measures for usual heavy drinking and risky single occasion drinking were derived for different time segments of the day from a 7-day drinking...

We consider optimally coordinated freeway traffic control for networks containing bottlenecks with capacity drop. Due to the multitude of traffic jams, and the spatial and temporal relationships between control actions and traffic behavior, this coordinated control problem is not as straightforward as for local control. The order in which the measures are applied may be relevant, or it may be p...

Traffic calming is a useful way of controlling speeds where it is unnecessarily excessive and inappropriate for the place and uses in the surroundings, (Taylor et al, 2000). There are high incidents of road carnage in Masvingo urban and its peripheral areas despite the constructed traffic calming measures.The rationality of traffic calming measures was based on the need to improve safety and en...

When designing or upgrading a communication network, operators are faced with a major issue, as uncertainty on communication demands makes it difficult to correctly provision the network capacity. When a probability on traffic matrices is given, finding the cheapest capacity allocation that guarantees, within a prescribed level of confidence, that each arc can support the traffic demands peaks ...