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.
The highway entrance management systems use ramp-metering in order to control the access of the vehicles on the highway in a matter that doesn't have a negative impact on the highway vehicle traffic flow. The access is permitted on specific moments, related to the traffic values on the highway and on the entering ramp, by using a control barrier. In this article we propose a laboratory model that...
This paper revolves around the evaluation of the achievable throughput in the context of an IEEE 802.11p-based vehicular subnetwork scenario where a completely isolated source vehicle, S, desires to communicate with a distant stationary Roadside Internet Gateway (RIG), D. Multi-hop inter-vehicular communication is exploited for the purpose of establishing a path between S and D along which downstream...
The causes of accidents on highway in any countries come from vehicle condition, human error, and highway physical conditions. F r o m t he accident statistic on the highway in Thailand, the major cause of the accidents is from aggressive driving behaviour. One way to decrease highway traffic accidents is to provide some information, such as alerts and warnings to the car drivers. Currently, people...
Emission modelling is one of the key applications of traffic simulation because it allows for the detailed evaluation of ITS and other traffic measures before implementation. In order to assess the outcomes correctly it becomes necessary to compare the different emission and traffic models for their applicability to different scenarios. This paper compares two different traffic models and three different...
This study proposes a symmetry-based forward vehicle detection and collision warning system (FCW) on smartphone. The proposed system identifies forward vehicle by shadow with vehicular symmetry. Through Bayes classifier tracking approach, it can reduce the error detection of image processing. Shadow detection with symmetry-based approach could improve the robustness of identifying forward vehicle...
It is expected that autonomous vehicles capable of driving without human supervision will be released to market within the next decade. For user acceptance, such vehicles should not only be safe and reliable, they should also provide a comfortable user experience. However, individual perception of comfort may vary considerably among users. Whereas some users might prefer sporty driving with high accelerations,...
This paper deals with macroscopic traffic modelling. It investigates real magnetic sensor data, provided by the Performance Measurements System (PeMS), in order to identify some traffic parameters related to a portion of the SR60-E highway in Califorina. Then, these parameters are used to validate a switched linear traffic model.
Vehicular Ad hoc NETworks (VANETs) are a major component recently used in the development of Intelligent Transportation Systems (ITSs). VANETs have a highly dynamic and portioned network topology due to the constant and rapid movement of vehicles. Currently, clustering algorithms are widely used as the control schemes to make VANET topology less dynamic for Medium Access Control (MAC), routing and...
In this paper the problem of vehicle lateral control in highway experimental conditions is addressed. The vehicle under consideration is equipped with an electric motor acting on the steering angle (the command input) and a vision system providing two measurements (the two outputs): the lateral displacement and the angular orientation of the vehicle with respect to the lane centerline. We show how,...
Consensus and control in networked highway vehicle platoons has been identified as a promising framework in developing intelligent transportation systems. In VANET environment, an information harmonized platoon can potentially offer enhanced safety, improved highway utility, increased fuel economy, and reduced emission. This paper is focused on available information harmonization and its request/response...
Traffic dependent speed limits have improved the security of highway traffic considerably. However, on highway sections controlled by variable speed limits large oscillations in speed can still be observed. On the basis of traffic data and a macroscopic traffic model, the influence of decentrally controlled speed limits on the states of highway traffic is analyzed. It is shown that local control of...
The land transportation network in Lebanon faces continuing and wide-ranging challenges at the level of infrastructure development, planning and overall system management. These challenges are already significant enough to seriously hamper the network's ability to deliver an acceptable level of service within reasonable norms for environmental, health and safety impacts, especially in and around the...
This paper proposes a modified version of vehicular ad hoc network media access control (VeMAC) protocol for further increased throughput. In the modified VeMAC, an additional bit is appended to the field for each time slot in the header used in VeMAC as the collision flag. Upon detecting a collision for a time slot, a node sets the collision flag for that time slot without changing the ID field and...
In this paper a novel battery electric vehicle (BEV) concept based on a small fixed and a big swappable li-ion battery pack is proposed in order to achieve: longer range, lower initial purchase price and lower energy consumption at short ranges. For short ranges the BEV is only powered by the relatively small fixed battery pack, without the large swappable battery pack. In this way the mass of the...
Vehicular Ad Hoc Network (VANET) technology enables efficient inter-vehicular communications for the broad-casting of public-safety and other critical message flows among unmanned autonomous vehicles. A key challenge in VANET broadcasting is to achieve a high throughput rate while at the same time assure the delivery of packet flows to all the vehicles traveling over a targeted segment of the highway...
The ever-increasing demand of vehicular mobility in today's life over loads the existing road transportation infrastructure and resources, for which a robust solution in the near future lies in effective utilization of currently available means of road transportation and infrastructure. For this purpose, development of Intelligent Transportation Systems (ITS) technologies that contribute to improved...
The ever-increasing demand of vehicular mobility in today's life over loads the existing road transportation infrastructure and resources, for which a robust solution in the near future lies in effective utilization of currently available means of road transportation and infrastructure. For this purpose, development of Intelligent Transportation Systems (ITS) technologies that contribute to improved...
We present a TLD-based vehicle tracking method, which uses HOG that is precomputed in the detection process, and an online SVM re-detector. We perform HOG-based tracking in EHMI. When the tracking fails, the system performs redetection for neighboring regions. Tracked vehicles are reused as positive data for re-learning. Therefore, the proposed system performs robust tracking without additional computation.
Intelligent Transportation Systems (ITS) play major role in generating fine grained vehicular traffic information for city wide or larger region. However, in developing countries like India, limited ITS infrastructure is available. On the other hand, cellular infrastructure is widely deployed in India with more than 867 million cellular connections and more than 70% cellular teledensity [1]. Also,...
In this paper, we present analytical models for the probability density function (PDF) of link life time and link reliability probability in vehicular ad hoc networks (VANETs), formed on single lane highways in free flow traffic state. Assuming the vehicle velocity to have Gaussian probability distribution we investigate the impact of vehicle mobility, path loss exponent and shadow fading on the link...
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.