نتایج جستجو برای: traffic situation

تعداد نتایج: 231102  

Journal: :IEEE Journal of Selected Topics in Signal Processing 2015

2004
Johan Wikström

Today’s train traffic control systems are most often designed with a focus on controlling the technology rather than on to support the train traffic controller in achieving optimal traffic solutions. Train dispatchers often have to interact with many separate information systems in order to understand the traffic situation, to make decisions and to perform control tasks. An integrated and compl...

2013
Lingli Li Hongxia Xia Lin Li Qingbo Wang

In recent years, the volume of traffic is rapidly increasing. When vehicles running through the tunnel are more intensive or move slowly, the tunnel environment occurs deteriorated sharply, which affects the normal operation of the vehicle in the tunnel. This paper uses the result of previous mining association rules to select feature items and to establish four training samples divided by time...

1999
Heribert Kirschfink

The following essay aims at the description of direct and indirect control mechanisms within the scope of real-time collective traffic control measures. A general system archtitecture of traffic control systems on motorways is presented, including the traffic data detection infrastructure, outstations to preprocess the detected impulses and to control the variable message signs (VMS), subcenter...

Traffic flow systems are nonlinear and uncertain, so it is very difficult to find their optimal points. In traditional traffic control systems, the traffic lights of crossings change in a fixed time period that is not optimal. On the other hand, most proposed systems are sufficiently capable of coping with the uncertainties of traffic flow. To solve this problem, there is a need to develop expe...

Journal: :Transportation Research Record: Journal of the Transportation Research Board 2020

Traffic conditions vary over time, and therefore, traffic behavior should be modeled as a stochastic process. In this study, a probabilistic approach utilizing Autocorrelation is proposed to model the stochastic variation of traffic conditions, and subsequently, predict the traffic conditions. Using autocorrelation of the time series samples of density and flow which are collected from segments...

Journal: :Wireless Sensor Network 2010
Ke Zhang Guangtao Xue

Currently, there are kinds of algorithms in order to detect real-time urban traffic condition. Most of these approaches consider speed of vehicles as a main metric to describe traffic situation. In this paper, we find out two important observations through several experiments. (1) In urban city, the speed of vehicles is influenced significantly by some factors such as traffic lights delay and r...

2003
Lars Wischhof André Ebner Hermann Rohling Matthias Lott Rüdiger Halfmann

Traffic and Travel Information (TTI) systems in use today are based on a centralized structure. Sensors along the roadside monitor traffic density and transmit the results to a central unit where a situation analysis of the global traffic scenario is performed. The resulting traffic information is made available to the drivers via broadcast service or alternatively on demand via cellular phone....

2010

This study compared pilot situation awareness across three traffic management concepts. The Concepts varied in terms of the allocation of traffic avoidance responsibility between the pilot on the flight deck, the air traffic controllers, and a conflict resolution automation system. In Concept 1, the flight deck was equipped with conflict resolution tools that enable them to fully handle the res...

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