The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
With the rapid growth of cities, urban planners are facing with challenges including road congestion, population overburden and so on. Managing such big and complex cities requires better understanding of the urban blocks' property. Traditional ways are mostly based on manual survey, which cost much and take long time. In this paper, we present a method to analyze the urban blocks' property and activity...
In Delay Tolerant Networks (DTNs), characteristics of mobility model have essential impact on routing protocols design and verification. Most of current studies about network characteristics are derived from theoretical models or small-scale real network traces. Properties of nodes in those networks are simple and can not reflect features in large-scale applications. In addition, few studies focus...
The technology of travel time estimation based on cellular network has received much attention recently because of its low cost, wide spread of cellular networks, and a large number of phones as potential road traffic probes. However, in practice, low positioning precision and uncertain route determination caused by complex traffic network make it difficult to ensure the accuracy of travel time estimation...
This paper presents a method of how to produce a calculate and express spatial relations by a set of parameters. A new set of parameters more easily to understand and use is proposed based on two semantic meanings. Also the Voronoi diagram's application in neighbor relations is discussed. By using the new set of metric parameters, complex spatial and topological relations can be easily expressed....
Urban transportation is very important for economy development of a city, and accurate and effective overall traffic status in an area provides the basis for transportation application service. This paper proposes a novel model-OTCEM, evaluating urban overall traffic condition effectively. In this model, a regional transport evaluation index is developed. Through the model, the trends of normal transport...
A set of distributed continual range query requests, each defining a geographical region of interest, needs to be periodically reevaluated to provide up to date answers. Processing these continual queries efficiently and incrementally becomes important for location based services and applications. In this paper, we propose an efficient incremental method for continuous range query characterized by...
Traffic incidents are a main factor that reduces capacity and service quality of roads. Due to the absence of efficient incident impact analyzing and predicting method, the traffic congestion and secondary accident brought by traffic incidents can hardly be avoided. In this paper we propose a history data based traffic incident impact analyzing and predicting method. By extracting regularity and volatility...
Recent researches have focused on continuous nearest neighbor queries in road networks with fixed weight, where all the users find the same routes to the nearest neighbors all the time. As more and more people follow the same way, traffic jams occur and users have to spend more time to get the destinations. In this paper, we propose a novel form of continuous k nearest neighbor queries considering...
Travel time is widely used to measure the effectiveness of transportation systems and becoming one of the most popular traffic information which travelers are interested in. The ability to accurately predict travel time in transportation networks is a critical component in advanced traveler information system (ATIS). This paper focuses on large-scale travel time prediction for urban arterial roads...
Nowadays Float Car Data (FCD) is playing an important role in real-time traffic information systems. However, traffic signal control in urban road network will cause random delay on float cars, and this kind of delay will result in considerable fluctuation of travel time. Thus, the accuracy of FCD system is seriously affected. In this paper, float car refining models are proposed to calculate the...
As an advanced means of collecting information of traffic condition of roads, floating car technology has drawn increasing attention from many countries. Whereas, floating car data (FCD) collected by floating car technology often could not cover all the roads of a city. Therefore, in order to increase the integrality and usability of FCD which reflects the traffic condition of roads, a model based...
Nowadays the floating car technology is playing a more and more important role in the dynamic route guidance, congestion management, traffic incidents detection, because it can collect more accurate travel time information in real-time traffic service systems. However the key problem of using it is that the moving direction and driving behaviors of floating car at low speed are dynamic and quite complex,...
Agora-C is a dynamic location reference method, which can match locations between dissimilar maps effectively. It references objects of the road network by a condensed selection of its real-world geographic properties which are stored in a digital map database, instead of utilizing pre-defined object IDs or look-up tables. This method is lack of practicability because of huge encoding bytes and low...
Nowadays the floating car data (FCD) is playing a more and more important role in the route guidance, because it can collect more accurate travel time information in traffic service systems. But the problem is that the congested traffic performs to be dynamic and quite complex, and therepsilas great data amount fluctuation at different time of day. Therefore, the stability of the data canpsilat be...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.