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Drivers change the lane over the road networks is a common seen practice when they face a slow, stopped or broken vehicle. Sometimes they have to change the lane to take the next exist or the next U-turn towards their targeted destination. Changing the lane requires that the driver should be aware of vehicles behind him on the new lane or vehicles intending to change to the same lane during that period...
Geocast routing in vehicular ad-hoc networks has become an area of interest for researchers as it is an essential part of ITS (intelligent transport system). Many vehicular applications require geocast i.e. fast and reliable warning message dissemination to particular regions. Several proposed approaches, consider a geocast region as a circular area with a center point and a radius. However, in case...
Accidents in the highway always cause lane occupancy but may not cause congestion. This paper analyses the theory combined with vissim for simulation and matlab for data analysis, which finds that the relationship between highway bottlenecks and congestion can be explained by catastrophe theory. Relations of traffic flow parameters (flow rate — density) will result in sudden change. That means the...
Highway has the characteristics of brittle as a complex system, and the interference from internal and external environment leads to collapse easily during the operation, which causes huge losses. In this paper, the brittleness theory is applied to the highway traffic system with the purpose of brittle nature analysis. With the comprehensive consideration of the influence of unit failure probability...
In order to improve the efficiency of response to and treatment of emergency by highway dispatching commands, a highway dispatching command system was developed based on knowledge base technology. Event auto-recognition, GPS, GIS, 3G, Web, video and some other technologies were used to implement the system. In this paper, we studied how to create an emergency resource scheduling scheme, an on-site...
Exist for highway congestion, traffic accidents, big risks, such as road maintenance cycles, this paper start from the definition of highway proposed standard highway design concepts and methods, illustrated by the legend. Type described in this article completely lane highway most of the features is to ensure that a variety of lane closure and specificity, and highway entrances and exits of the design...
In recent years, with the extending highway construction scale in mountain areas, there is lack of traffic safety facilities in some mountain areas. The problems of unreasonable and irregular traffic guarantee engineering construction stand out. Especially in rural highway in mountain areas with complex topography, the traffic accident rates are increasing, causing lots of dead and economic losses...
Traffic conflict studies have been widely used because the data of traffic conflicts can be collected and evaluated in a short period of time. Widespread studies have shown that there is close relationship between traffic accidents and traffic conflicts. Since the data of traffic accidents are usually inadequate and the application of traffic accident analysis often requires long periods of data accumulation,...
Roadside units (RSUs) are a critical component of Vehicular ad hoc network (VANET). Ideally, RSUs should be deployed pervasively to provide continuous coverage or connectivity. However, during the initial stages of VANET, it will not be possible to ensure such a pervasive RSU deployment due to the huge cost and/or the lack of market penetration of VANET enabled vehicles. Given a limited number of...
This paper reviews the studies which have been performed in two-lane highway traffic safety research, and select random-effect negative binomial model to illustrate the traffic safety character of two-lane highway in plain area. More than 1380 kilometers(about 56 highways) two-lane highways in Beijing and Shandong province are investigated and the traffic safety data are collected, such as accident...
In order to ensure ambulance man arrived the scene on time, remove the accident, treat the injured after the accident occurred, and achieve to the minimize loss of traffic accidents and the maximum social benefits, basing on the principles of reliability, this paper which started with emergency rescue system structure analyzed the structure of emergency rescue system on highway, from three ways: incident...
Road traffic safety is a complex problem which involves many factors as human, vehicle, road and environment and so on. For the road factor, the horizontal alignment can not be ignored, especially the horizontal curve. Although the accident rate happened on curve is higher than the straight line, it is inevitable to design horizontal curve. As the traffic accident becomes serious gradually, the paper...
Safety is evergreen vital criteria for road traffic. We propose an infrastructureless solution based on contexts to increase safety of vehicle. Contexts characterize and track the moving environment of a vehicle. Here, environment means the vehiclepsilas own status like geographical position, break-controlpsilas functional status, driverpsilas status etc., and the status of neighboring vehicles. Contexts...
The unique characteristics of highway intersections have caused them to be the most dangerous places in the road system. Complexity of causes of traffic crashes at highway intersections, difficulty in data collection of traffic accidents and traffic conflicts and many other reasons have made safety performance evaluation of highway intersections one of the most difficult tasks, in spite of the fact...
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