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.
Vehicular density control on the motorway mainlines is a complicated problem and traditional control approaches of ramp metering prove to be unsatisfactory. In this paper, a composite control method based on credit assignment cerebellar model articulation controller (CACMAC) and proportional-integral-derivative (PID) controller is applied to highway density control. Firstly, a macroscopic traffic...
Lane detection is one important process in the vision-based vehicle assist system. The results of lane edge detection play an important role in feature-based lane detection. The complicated conditions of road make the correct edge detection of lane markings become very challenging. In order to get an ideal edge of lane markings in road image, a method of lane edge detection based on Canny algorithm...
Electroencephalogram (EEG) is a widely used experimental tool in psychological research. In this study, we used EEG to research the driving safety by measuring the dynamic changes of drivers' emotions in a long tunnel. Through the study whether there was a tunnel, and whether there was a large amount of traffic flow in the tunnel, we found a long tunnel only makes a slight negative effect on driver's...
Traffic retention is an important factor of intelligent transportation system, which can vividly reflect current state of the road. Accurate estimation of traffic retention can provide support for the dynamic allocation of the traffic signal, thus alleviating the problem of urban traffic congestion. The traditional method can only estimate the long-term or red light traffic retention according to...
The emerging of the intelligent transportation system especially in the research area of traffic surveillance and solving traffic congestions, become notably crucial for traffic operators in the aim of achieving efficient vehicle flow. However, behavioural manoeuvres that describe the pattern of vehicles movements and change of the vehicle flow are not sufficiently modeled based on the conventional...
Despite the recent success of deep-learning based semantic segmentation, deploying a pre-trained road scene segmenter to a city whose images are not presented in the training set would not achieve satisfactory performance due to dataset biases. Instead of collecting a large number of annotated images of each city of interest to train or refine the segmenter, we propose an unsupervised learning approach...
A study of signal control effects on vehicle's emissions through a sequence of traffic lights was conducted. To describe the states of traffic lights, a signal state function was proposed. Meanwhile, a modified car-following model was developed and applied to show the traffic behaviors at signalized intersections on a roadway. The moving behavior of vehicle was discussed in three modes: free running...
Creating road maps is essential for applications such as autonomous driving and city planning. Most approaches in industry focus on leveraging expensive sensors mounted on top of a fleet of cars. This results in very accurate estimates when exploiting a user in the loop. However, these solutions are very expensive and have small coverage. In contrast, in this paper we propose an approach that directly...
Intra-Vehicular Wireless Sensor Networks (IVWSNs) is one of the major advances in electrical smart cars. It could extend the driving distance of E-cars by reducing the weight of bulky cables. It can also bring more sensing functions, turning the car into smart units for Intelligent Transportation Systems (ITS). Until now, most works of IVWSNs channel characterization are focused on in-car wireless...
Designing the controller for active suspension system is the topic of great interest among the control engineers since long to provide the ride comfort to the passengers under the rough and uneven road surface. In this paper, a super twisting control algorithm of second order sliding mode controller is designed and implemented on the quarter car system. The super twisting algorithm attenuates the...
This paper reports an image-based localization for automated vehicle. The proposed method utilizes a mono-camera and a low-cost velocity and inertial sensor to estimate the vehicle pose. Image template matching is applied to provide a correlation distribution between the captured image and a vector structured digital map. A probability of the vehicle pose is then updated using the obtained correlation...
A semi-active hybrid energy storage system, consisting of a Li-ion battery pack, dc/dc converter, and Li-ion capacitor pack is developed for a range extended plug-in vehicle application. The vehicle has a series-parallel drivetrain with two electric motors, a gas engine, gearbox, and a clutch to allow the engine to run decoupled from the gearbox in range extending mode. The peak dc electrical requirement...
Capacity is defined as the maximum traffic flow passing through a section of a road per hour, which is not related to the length of the link or the traffic characteristics of the upstream and downstream intersections. The traffic condition cannot be accurately expressed when the road is congested. The concept of Link Capacity was proposed in the paper, and the Link Capacity calculation model was established...
Real-time ridesharing systems have been investigated as a potential method for improving congestions in overloaded road networks. In this paper, we specifically investigate integrating dynamic road conditions (DRCs) such as traffic accidents into the ridesharing systems, as the DRCs will cause unexpected delays during the route planning phase. We propose to use the CRP framework due to its capability...
In this paper, we propose a novel method based on Dijkstra algorithm for parking lot to find an optimal route and solve the difficulties in finding parking spaces and traffic congestion nowadays. Firstly, by means of the traditional Dijkstra algorithm, which is a common way to solve the shortest path problem, we combine it with the impedance function model to obtain the dynamic time of the route....
To solve the traffic congestion problem in the highway mainlines and to improve ramp metering effect, we propose a road density control approach based on the traffic model and compound control. This compound control is a combination of proportional-integral-derivative (PID) controller and credit assignment cerebellar model articulation controller (CACMAC). Firstly, a cell transmission model (CTM)...
Map matching, as one of the key steps, is widely used in navigation, estimation of traffic flow, path planning, etc. With the emergency of large traffic track data, the demand for matching speed is becoming higher and higher. This paper describes a method of map matching based on grid index, which is used to quickly get the closest K candidate sections to improve the speed of map matching. When establishing...
The introduction of Head-Up-Displays (HUDs) have opened up avenues for a whole range of novel AR applications. However, until these applications become available for the mass market a number of problems need to be tackled. For example, the field of view (FoV) of current HUDs is extremely limited, and real world tracking and 3D reconstruction are still not precise enough to show driving information...
Moving target detection is an important part of intelligent video surveillance system, in which background difference method and inter-frame difference method are the two most commonly used methods. This paper has analyzed the principle and algorithm of these two methods, the program simulation is realized based on open source platform of OpenCV. The experimental results show that the two methods...
Malfunctioning areas and various business-IT mismatches encumber the achievement of strategic alignment. This paper deals with the concept of misalignment, with special attention to enterprise architecture (EA)-based analytical potential. In this paper, an analytical solution is tested in form of a case study at a road management authority. The study proposes a rule-based framework to reveal the symptoms...
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.