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.
This paper presents a vehicle routing problem in dynamic urban traffic network with real-time traffic information. Both re-current and non-recurrent congestion are considered in the problem. We develop a method to solve the problem by combining the initial routes arrangement with the real-time route adjustment. The initial route planning is made by solving a time-dependent vehicle routing problem...
Driver fatigue and sleep deprivation have been widely recognized as critical safety issues that cut across all modes in the transportation industry. FMCSA, the trucking industry, highway safety advocates, and transportation researchers have all identified driver fatigue as a high-priority commercial vehicle safety issue. There has been much research work done in driver fatigue detection. This paper...
In the lane change process, the different types of drivers have different behavior characteristics, the same driver in different road environments has not the same behavior, in order to design lane change model based on driver characteristics, it is necessary to study drivers' lane change characteristics. With real vehicle data, analyzed the lane change characteristics of the same driver on Beijing...
Intelligent Transport System (ITS) strategies can significantly reduce CO2 emissions of vehicles. Since the impact of ITS measures is highly dependent on driver acceptance and compliance rates, it is important to study the response of human drivers to new ITS strategies (the “human factor”). However, there is currently no low-cost yet effective method to investigate the human factor. Conventional...
Traditional time-of-arrival estimation techniques are often used in advanced transportation systems such as in-car navigation systems and fleet management systems. These techniques tend to neglect certain categories of context when estimating a vehicle's time-of-arrival at a given destination. Particularly important categories of such neglected context include driver behavior patterns and traffic...
Small rural communities are often located along major state or county highways and as a result much of the traffic along their main thoroughfare is pass-through rather than local. Unfortunately, drivers passing through those communities often enter at high speeds and then maintain those speeds throughout creating a safety problem for the community. High speeds also discourage pedestrian activities,...
Scheduling and human resources management have an important role in the productivity and competitiveness of a company. Timetabling is an essential task in such filed to compete in many sectors. The conventional method which is traditionally done manually for solving timetabling problem is often inaccurate. This paper move toward automated software to solve the timetabling problem for the SORETRAS...
Emergency maneuvering systems can take control of a vehicle in high-risk situations caused by distracted, fatigued, or careless drivers, which can reduce the frequency and severity of collisions. But in order to override the user's control the vehicle must reason with uncertain information: sensing provides noisy and partial input, vehicle dynamics models are never perfectly calibrated, and other...
In this paper, we evaluate how traffic-load dependent vehicle routing at intersections is able to improve the connectivity status of all streets. To this end, we consider a VANET scenario, comprised of several streets and intersections. Then, we focus on two vehicle routing algorithms, one based on the distance to destination, i.e., traffic-load independent (TLI) algorithm, and another one based on...
Fuel-efficient driving is difficult in unknown or complex environments. To aid the driver with this task, we present a novel method of tactical route optimization by calculating a short-term fuel-reduced velocity profile. This profile is based on knowledge of location-dependent velocity profiles that are collected by the vehicles over time and shared with other vehicles. To determine a fuel-efficient...
We propose a driver risk evaluation method based on the analysis of driving data captured with drive recorders. To evaluate the acceleration behavior of each driver we plot the maximum acceleration per minute to velocity on a two-dimensional plane and approximate the distribution by linear regression. We assume that the higher the y-intercept of the line, the quicker the driver accelerates from a...
This paper introduces the overall design of vehicle bus data acquisition and fault diagnosis system on the basis of OBD, focusing on its lower computer system and the upper computer system design principles. This system is based on the widely used CAN bus technology, to extract the vehicle's status or fault information. The CAN bus adopts the SAE J1939 protocol standards, maximize the superiority...
Unexpected shift often occurs in the working of an automatic transmission. This paper analyzes the causes of this phenomenon and its influences on the heavy-duty vehicles' AT. The method of setting a reasonable shift delay interval and realtime detection on torque converter speed ration is proposed to solve this problem. The shift control strategy to eliminate unexpected shifts is designed and validated...
This paper presents a FCV powertrain model using a combined forward/backward approach. The advantage and disadvantage of forward-facing approach and backward-facing approach is discussed and a combined approach is presented and used in the modeling of FCV powertrain. The structure of the model is identical with the typical actual FCV powertrain. The model involves with two parts: power calculation...
Based on a large number of experimental data, a simple construction method of driving cycle named fixed step intercept is used to construct the driving cycle of Hefei. In data processing, three definitions of running statuses are defined. The results and errors of different definitions of running statuses are analyzed through 11 characteristic parameters which reflect the road traffic characteristics...
Traffic congestion is a perennial problem at seasonal tourist destinations throughout the world. Meanwhile, understanding the mode choices of tourist's traveler will help to identify effective solutions. This analysis contributes to that effort by characterizing the mode preferences of tourists under parking and cordon polices in central business district (CBD) of Mashhad city. With respect to the...
Adverse conditions have been shown to have a substantial impact on traffic flow operations with a substantial impact on network performance. In order to quantify adaptation effects in driving behavior underlying this impact car-following models can be used. In this contribution it was examined to what extent the position of action points in the relative speed - spacing plane as well as acceleration...
The flue gas that is emitted by vehicles in a tunnel accumulates and cause serious pollution. A vehicle emits a large amount of flue gas as it moves. In particular emitted gaseous carbon monoxide (CO), can influence the driver drives in a long tunnel without their knowledge, affecting the safety of driving. Additionally, when a driver drives in a long tunnel, the dark and monotonous surroundings can...
Electronic Stability Control (ESC) is one of the most effective methods of controlling the Yaw moment in vehicles. This method is based on unequal distribution of tire forces (mainly braking forces) and is particularly effective when tire behavior is in nonlinear zone and loses its sensitivity to the steering input. While different approaches for evaluating the adequate Yaw moment have been developed,...
The structure and principle of the active front steering system (AFS) are introduced and the dynamic model of AFS is established in this paper. In order to improve the AFS steering characteristic, the PID controller and Fuzzy-PID controller are discussed. The simulation results show that rising time of the new control strategy is reduced a lot compared with traditional PID algorithm. The system performance...
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.