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Travel time estimation is one of the core problems in Intelligent Transportation System (ITS) and Floating Car Data (FCD) is an important data source used by many cities to estimate it. This paper utilizes the Next Generation Simulation (NGSIM) project dataset to simulate the FCD scenario, to test the accuracy of FCD based link travel time estimation. In the first part, the calculated time from simulated...
The application of GPS probes in traffic management is growing rapidly as the required data collection infrastructure is increasingly in place in urban areas with significant number of mobile sensors moving around covering expansive areas of the road network. The paper presents the development of a laboratory designed to explore GPS and other emerging traffic and traffic-related data for traffic monitoring...
This paper presents an intelligent on-line route guide system using leader-following concept in a fleet. In order to achieve the concept of a car leader leading other car members in a fleet, we establish their contact through the real-time GPS position data with a 3G wireless communication. Every car members can obtain the real-time positions of the leader car and other car members. Then, the corresponding...
Recently, the problem of automatic traffic accident recognition has appealed to the machine vision community due to its implications on the development of autonomous Intelligent Transportation Systems (ITS). In this paper, a new framework for real-time automated traffic accidents recognition using Histogram of Flow Gradient (HFG) is proposed. This framework performs two major steps. First, HFG-based...
In the previous work, the authors proposed an efficient method to abstract human skill based on HHARX model, and successfully applied the obtained human skill models in an automatic driving system based on PC. This paper proposes a method to realize the human driving skill models based on embed microcontroller OMAP3530. In the system, Omap3530 realize real time image collection and processing, driving...
The recognition and tracking of traffic lights for intelligent vehicles based on a vehicle-mounted camera are studied in this paper. The candidate region of the traffic light is extracted using the threshold segmentation method and the morphological operation. Then, the recognition algorithm of the traffic light based on machine learning is employed. To avoid false negatives and tracking loss, the...
This paper elaborates on the Cybercars-2 Wireless Communication Framework for driverless city vehicles, which is used for Vehicle-to-Vehicle and Vehicle-to-Infrastructure communication. The developed framework improves the safety and efficiency of driverless city vehicles. Furthermore, this paper also elaborates on the vehicle control software architecture. On-road tests of both the communication...
The present technologies provide only assistance in a car for controlling the relative speed and distance between two vehicles in the same lane and permit to drive at a constant given speed in a Highway free of traffic and to maintain a constant distance with the vehicle ahead but not collision avoidance But the proposed system provides enhancements in the present adaptive cruise control system, which...
At present, most vehicle monitoring systems are based on the client/server structure. According to their disadvantages, an intelligent public transport monitoring system based on WebGIS is constructed. System working principle, design method and main functions are introduced in detail. A fast and practical road match algorithm, is put forward. The system has been used in two domestic cities and has...
This research aims at the bus holding strategies for the simulation of mass rapid transit (MRT) transferring system in a terminal station with platform constraints for bus in the metropolitan area. We developed and evaluated the transfer system through computer simulation models for MRT with bus system that the goals of bus holding strategies in the model were: reduce bus waiting time, reduce passengers...
Vision difference or inattention to the traffic condition often causes the unnecessary traffic accidents while driving. Therefore, this study is to fast detect both the preceding vehicle and lane marking at the least response time 0.5972 seconds. After coordinate transformation converts image plane coordinates of the preceding vehicle to GPS coordinates, the headway between cars is obtained to assist...
Advance Traveller Information Systems (ATIS) are considered a promising tool to alleviate traffic congestion and improve road network performance. They provide real time traffic information and route recommendation to road users, in order to increase their ability to choose the best alternative path. Though such systems have reached a high technical standard, their actual impact in traffic pattern...
An intelligent traffic lights controller dealing with the dynamic traffic flow is presented in the paper. The vehicle delay at the intersection is reduced by using this method based on the fuzzy algorithm to distribute each roadway's green time. The input of the fuzzy control algorithm is the vehicle flow on the current traffic lane and the difference between the length of the waiting traffic team...
An urgent problem facing urban management departments and public transport enterprises has been how to dispatch and manage public transit vehicles in an efficacious way and how to develop the Strategy of Public Transport Priority in China. For the purpose of upgrading public transportation service and shortening the travel time of passengers, great importance should be attached to studies on the urban...
Detecting vehicles from video sequence is very challenging due to the wide varieties of vehicle appearances and the complexity of the backgrounds. At present, many algorithms in the image recognition have a narrow applicability and a weak real-time. Aiming at this problem, a recognition method which was combined by features extraction using Gabor wavelet and BP neural network algorithm for the classification...
Making full uses of the processing performance and peripheral features of DSP TMS320DM6437 chip, we innovatively designed a vehicle collision avoidance system with low-cost, high reliability. The system can achieve functions of vehicle detection, vehicle distance measurement and auto-assisted control. Through simulations and experiments, we verified the correctness of the system's hardware platform,...
This paper introduces a two-level risk estimation system suitable to control in ITS. The top-level risk estimation is done on the basis of perceived risk associated with various driving situations and affected by weather, traffic and road conditions. The high-level risk estimation is then refined on the basis of real-time information about the vehicle surrounding, such as motions of other vehicles...
As the number of electronic control units (ECUs) in vehicles increases, ECUs can create a large and complicated in-vehicle network. Therefore, in-vehicle networks need a network management algorithm for improved reliability. The open system and corresponding interfaces for automotive electronics/vehicle distributed executive (OSEK/VDX) set a goal of being the industry standard for real-time operating...
A real-time data processing algorithm based on run-length encoding (RLE) for an intelligent racing vehicle is introduced in this paper. In order to improve the achievement of the intelligent racing vehicle's running in the second loop by recoding route information, a new method based on RLE is provided by setting an optimal calculus threshold. Simulated by Matlab/Simulink, the route memorization algorithm...
Future active-safety applications in vehicular networks rely heavily on the support for real-time inter-vehicle communication. The medium access control (MAC) mechanism proposed for the upcoming IEEE 802.11p standard intended for intelligent transport systems (ITS) applications does not offer deterministic real-time support, i.e., the channel access delay is not upper bounded. We therefore propose...
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