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Safety performance of highways has always been the focus of traffic engineering studies. Although many factors impact safety of highway transportation, at-grade intersection spacing is by far one of the most important factors. In reality, many situations can lead to closely neighbored intersections which become major causes of traffic accidents. To improve safety, intersection spacing should guarantee...
The small and medium-sized cities (SMSC) in China are in the rapid urbanization process. The urban growth and economic development may lead to traffic, energy and environmental problems. This paper focused on developing an appropriate transit mode in SMSC in order to abate these problems. For this purpose, the paper firstly discussed the relationship between land use pattern and transit modes, and...
Traffic conflict studies have been accepted because the data and the effectiveness of a treatment of safety problems can be collected and evaluated in a short period of time. Driving behavior is the reflection of the vehicles operating characteristic, and it has close relation with traffic safety. In the paper, the process of vehicle coming and going at intersection, and driving behavior when conflict...
Location Based Service (LBS) is one kind of ubiquitous applications whose functions are based on the locations of clients. The core of LBS is an effective positioning system. As wireless LAN (WLAN) costs less and is easy to access, using WLAN for indoor positioning has been widely studied recently. K nearest neighbors (KNN) is one of the basic deterministic fingerprint based algorithms and widely...
Building large-scale smart environments is one of the long-term goals of ubiquitous computing. The widespread of context information in such environments necessitates an effective context retrieval mechanism. This paper proposes a novel context retrieval method based on applications' query patterns. We propose high dimensional vector to model contexts from applications' perspective, and apply the...
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