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Hazardous materials accidents during the process of transportation have caused enormous danger and loss to life and environment in recent years. Especially in an urban area, high population density, heavy traffic congestion and link closures face the complex and changeable situations. In this study, a multilevel programming model is formulated to minimize the total risk and time for non-fixed destination...
In view of five kinds of catastrophes in the Three Gorges reservoir area, this thesis takes natural catastrophe as the example, and uses the Bayesian networks model to carry on the analysis of the catastrophe formation mechanism, and uses the quantitative method to solve the key question which the catastrophe mechanism studied in the Three Gorges reservoir area, provides the feasible scientific basis...
It is a trend that the big cities will develop underground transportation other than viaduct to solve city traffic problems. The underground expressway can bring more benefits, although it costs a lot. The indirect benefit costs are difficult to be determined in national economy evaluation model of underground projects, This paper mainly introduces the recognition method of project cost and benefit...
This paper briefly introduced the characteristics and importance of virtual reality, and discussed traffic problem in reality, then focused on the feasibility and realistic significance of the application of virtual reality technology in Transportation. Furthermore, by theoretically simulating traffic situations in bad weather and predicting varied scenes of traffic flow with virtual reality technology,...
Expressway transportation is playing a more important roll in economic construction and social life. The expressway network status, including section flow and average speed, is important to the expressway management for analysis and decision making. Traditional ways of monitoring the road is using detectors which cost much to install and maintain. We propose speed constraint deducing model and similarity...
Routing problem is a serious concern of road safety in Hazmat transportation due to their accident impacts. A number of mathematical models have been developed to determine the route of hazmat transportation to minimize the risk and impacts and solution approach have been considered regarding to their characteristics such as network size and type of variables. In this paper, mathematical models and...
Motor vehicles consume a big share of the world's oil supply. They are, also, the major source of pollution to the surroundings. Efficient designs, alternative fuels and rational transportation systems can help solve the problem. In Libya, the rapid increase in the use of the private vehicles has resulted in increased traffic congestion, accidents, inadequate parking space and air pollution, among...
It was an important to improve urban transportation management level by carrying out urban transportation management planning. According to the characteristics of urban transportation management planning, the evaluation model of urban transportation management planning project was studied based on fuzzy theory. First, the 14 evaluation index of urban transportation management planning project was...
Public transport is one of most complicated systems in a modern city. Based on the grey system theory, a grey relational assessment model on service quality of urban public transport is put forward. On the Basis of above, this method is applied to evaluate the service quality of public transport in one northern city.
Emergencies have been bringing huge damage, even worse when emergency event chain reaction is formed. Different emergency evolution models have been studied in the systematic perspective to find out common characters and correlation among four various emergency events. We propose an academic framework with four hierarchies including single event, event chain, event network, and event supernetwork...
The management of green supply chain takes into account the environmental impacts of the processes of supply chain. Considering the great environmental awakenings at the planetary level and the discounted growth of the carriage of goods per mode within the European Union, the distribution and haulage companies must start to take measures to limit their impacts. The goal of this paper is to model the...
A model is developed to evaluate the region traffic safety using principal component analysis (PCA). Traffic safety index obtained by the proposed model is a good measure to the level of the region traffic safety. The main difficulty of this model is how to choose the evaluation data basis because of the fact that different data basis has different evaluated results. In this work, two kinds of typical...
Currently the operation model of urban taxi system faces lots of defects and problems, it's inevitable to solve problems and come up with a new program to improve this system, because of which the whole profit of the enterprise is low. In order to decline the rate of vacant transportation of the taxi, this paper analyses the main factors that may influence the efficiency of taxi operation and build...
This paper presents a Geographical Information System (GIS) based risk assessment model for road transportation of hazardous materials (hazmat). Existing and proposed risk models are applied to truck shipments of hazmat through the road network of Istanbul. Our empirical analysis on the Istanbul road network points out that different risk models usually select different routes between a given origin-destination...
In an embedded system, the hardware resources are limited. In order to obtain such traffic information as traffic volume and vehicle speed in an embedded system, a series of efficient video processing algorithms and optimization techniques are proposed. The key algorithm to detect vehicles is the background subtraction method, in which the approximated median filter is applied to obtain the simulated...
The environmental, social and economic impacts of videoconferencing in the USA and Japan were evaluated and compared quantitatively. For this purpose we used a new index, named the ldquogross social feel-good (GSF) indexrdquo, which was developed for evaluating both the positive and negative effects of ICT services. The impacts of videoconferencing in the two countries were different especially as...
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