In modern intelligent transportation systems, the video image vehicle detection system (VIVDS) is gradually becoming one of the popular methods at signalized traffic intersection due to its convenient installation and rich information content provided. However, in the current VIVDS, the camera usually is installed at the roadside poles or traffic light poles, which not only requires more than one camera to cover the entire intersection, but also results in serious vehicle occlusions and adverse affects on the performance of the vehicle detection and tracking. Meanwhile, it is noted that the detection rate of the black, gray and dark color vehicles (such as red, blue, and green vehicles) are poor or incomplete detection by using the traditional background subtraction method in the RGB color model. To tackle these problems, this paper presents a novel VIVDS with the new camera installation, which only uses a single camera to cover the panorama view of the interested intersection. Furthermore, a robust vehicle detection algorithm with multi-information fusion has been developed to resolve problems of detecting incompletion, which plays a key role in enhancing the vehicle detection rate in the proposed VIVDS for urban traffic surveillance. The proposed system has been tested on a traffic image sequences recorded at typical urban intersections. The experimental results show that the system offers the flexibility to detect the different color vehicles, the robustness to noise and the efficiency of computation.

Video Image Vehicle Detection System for Signaled Traffic Intersection

This report documents the activities and results of a test of non- intrusive traffic detection technologies. Seventeen devices representing eight different technologies were evaluated in varying environmental and traffic conditions. The following technologies were tested: passive infrared, active infrared, magnetic, radar, doppler microwave, pulse ultrasonic, passive acoustic, and video. Testing was done at both freeway and intersection locations. Emphasis was placed on urban traffic conditions and locations that typify temporary counting locations. The evaluation also focused on the ease of system setup and use, general system reliability, and system flexibility.

Field test of monitoring of urban vehicle operations using non- instrusive technologies : final report

Investigation of Environmental Impacts on Piezoelectric Weigh-In-Motion Sensing System

Nowadays traffic data is obtained from multiple sources including GPS, Video Vehicle Detectors (VVD), Automatic Number Plate Recognition (ANPR), Floating Car Data (FCD), VANETs, etc. All such data can be used for route finding. This paper proposes a model for finding the optimum route based on the integration of traffic data from different sources. Ant Colony Optimization is applied in this paper because the concept of this method (movement of ants in a network) is similar to urban road network and movements of cars. The results indicate that this model is capable of incorporating data from different sources, which may even be inconsistent.

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Gis-based route finding using ant colony optimization and urban traffic data from different sources

Hydrodynamic characteristics and wake structure of flow over a round-ended cylinder is invaluable for the design of associated cylindrical structures such as bridge piers and submerged floating tunnels (SFT). This paper reports the results of a numerical investigation into the flow past a round-ended cylinder and the associated hydrodynamic forces as well as the evolution of vortex structure and boundary layer separation. The effect of incidence angle α, ranging from 0{degree sign} to 90{degree sign}, is examined at a low Reynolds number of 100 based on the projected length. Both the drag and lift forces are sensitive to the incidence angle. When 0{degree sign} < α < 90{degree sign}, boundary layers asymmetrically separate from two sides of the cylinder, giving rise to a time-mean pressure difference that is not perpendicular to the incoming flow direction. There are two directly related results, one is the non-zero time-mean lift coefficient, and the other is the occurrence of a secondary frequency of drag coefficient same as that of lift coefficient. The most forward separation point of upper boundary layer and the maximum size difference of vortices generated from two sides contribute to the maximum time-mean lift coefficient occurring at α = 45{degree sign}. The vortex formation length is shortened with increasing α, resulting in the augment of the fluctuation amplitudes of fluid forces. The enlargement of drag force is mainly attributed to the broadened wake width with the increase of α.

Hydrodynamic characteristics and wake structure of flow over a round-ended cylinder at a low Reynolds number

The state-of-the-art review on the wake alteration of a rotating cylinder and the associated interaction with flow-induced vibration

Flow-induced rotation of a circular cylinder with a detached splitter plate and its bifurcation behavior

The Texas Department of Transportation's (TxDOT's) Transportation Planning and Programming (TPP) Division routinely tests a wide variety of devices for counting axles or vehicles; measuring vehicle speed, headway, and gap; classifying vehicles by length and/or axle spacing; and weighing vehicles in-motion. However, TPP needs a traffic monitoring equipment evaluation facility to enhance its capabilities in conducting these tests, in facilitating training, and in allowing vendor comparisons and demonstrations. This project investigated funding sources, design options, and viable locations for this traffic monitoring equipment evaluation facility. The project provided research and development to design a generic facility to evaluate traffic data collection equipment and sensors and perform traffic data collection research. This report covers the first 9 months of this 2-year project, identifying potential funding sources and candidate sites for further consideration. The most prominent funding sources are construction funds (include the site as part of a TxDOT construction project) and State Planning and Research (SPR) funds. The most promising sites identified thus far are on I-35 north of Georgetown near the Bell County line. Future research will include an evaluation of Kistler Lineas Quartz weigh-in-motion (WIM) sensors, a determination of minimum pavement structural support to ensure adequate sensor service life, and a forensic evaluation pertaining to failure mode of East Texas in-pavement traffic monitoring sensors.

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Jinze Song

Papers

The state-of-the-art review on the wake alteration of a rotating cylinder and the associated interaction with flow-induced vibration

Flow-induced rotation of a circular cylinder with a detached splitter plate and its bifurcation behavior

Initial investigation for traffic monitoring equipment evaluation facility

Flow-induced rotation modes and wake characteristics of a circular cylinder attached with a splitter plate at low Reynolds numbers