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In this work, the first reported integrated silicon carbide (SiC) CMOS gate driver is presented. The gate driver is designed in a 15V, 1.2 µm silicon carbide CMOS process, and simulated from 25 °C to 300 µC. The gate drivers are packaged and tested over a wide temperature range. Measured peak output current exceeds the 4 A source, 8 A sink current design goals at room temperature. The measured gate...
Limitations of silicon (Si) based power electronic devices can be overcome with Silicon Carbide (SiC) because of its remarkable material properties. SiC is a wide bandgap semiconductor material with larger bandgap, lower leakage currents, higher breakdown electric field, and higher thermal conductivity, which promotes higher switching frequencies for high power applications, higher temperature operation,...
This paper presents the optimal light-emitting-diode (LED) array combination for the peak current mode discontinuous-conduction-mode (DCM) boost driver, based on the efficiency consideration. The design guideline to specify the conduction mode for the operation of the employed boost driver corresponding to the combinations of an N×M LED array is proposed. The prototype circuit is built to compare...
City logistics is one of the causes of today's road congestion in our cities, but at the same time its efficiency is affected by the traffic problems. The driving behaviour and mission strategies used by vans and lorries operating in urban areas usually does not exploit modern infomobility solutions. CityLog, a project co-funded by the European Commission within the 7th Framework Programme, aims at...
Social navigation provides drivers with an advice that aims to shift traffic flows in a network from a user equilibrium to a system optimum. The advice is based on minimizing a combination of the individual travel time and the marginal total travel time in the network. The level of altruism defines the extent to which a driver is willing to sacrifice his own travel time in favor of other drivers....
ITS systems can help reduce CO2 emissions in three different ways, which need to be evaluated using different modeling paradigms. The ITS systems that reduce demand for vehicle travel should be analyzed using regional transportation planning models that explicitly represent modal choice and pricing sensitivity of travel choices. The ITS systems that improve vehicle operating efficiency should be evaluated...
In this paper, we argue that a large-scale demand responsive system is the missing element from the spectrum of the urban transport modes. To this end, we provide a comprehensive analysis addressing this broad question from several aspects including the customers' perception, various technical aspects, and the related societal aspects. In each case, we are able to give sound arguments why a mass demand...
Traffic congestion is a world-wide problem with far-reaching consequences. Due to road topology as well as driver behavior, extreme degrees of congestion can occur. Just as in biological swarms, stochastic properties of individual agents contribute to the emergence of macroscopic network properties. In this paper we apply approaches for swarm behavior to road traffic, expanding them to include road...
This brief deals with the improvement of a vehicle's pass-through of predictively known urban driving situations concerning its fuel consumption. Today's technology enables the prediction of information about traffic events. This information can be used to identify efficient driving strategies. The main aim is to reduce the dynamics in the velocity profiles of driving situations and with it the corresponding...
Eco-routing is the identification of the most energy-efficient route for a vehicle to travel between two points and is offered as a way in which drivers can reduce fuel consumption and consequently reduce the carbon footprint of their journeys. This paper covers the first step in the process of investigating the impacts of digital map attributes on the calculation of an eco-route. A research tool...
Speed and homogeneity of speed are important factors for safe and sustainable traffic. Lower speeds and more homogeneous speeds are safer and cause less pollution. Speed behavior is influenced by environmental factors as well as by personal factors. Understanding the relation between speed behaviour and the influencing factors offers clues for appropriate countermeasures against inappropriate and...
Road transportation is an essential component of the European economy. However, this sector is responsible for the increase of emissions and fuel consumption from year to year. Traffic incidents are one of the main causes of congestion. This paper has the main objective to calculate the consequences in traffic performance, fuel consumption and emissions that result from the occurrence of road incidents,...
Nowadays, more and more foreigners participate in vehicle driving test in order to get the driver's licenses in China. Because they are not familiar with China's road traffic safety laws or road conditions, part of them are often involved in traffic accidents. This paper is to discuss the important and difficult points of theory teaching in motor vehicle driving training for foreigners, as well as...
Rural highway traffic accident data collected by survey of 9 counties in 3 different provinces in China are studied. The studies show there are six special characters of rural highway traffic accidents. In rural highway the vehicle type is more complex and the large proportion of vehicle is unlicensed. Most accidents happened in 2 and 3 class road in rural area. The highway is in poor condition. The...
Service area is one of fundamental parts in freeway, an important mark to show freeway's perfection. Its disposition plays very important role in reducing the traffic accidents, optimizing the driving environment, raising the operational and social efficiency. The issue, which should be seriously considered during freeway plan and construction, is how to make facility disposition at service area suitable,...
This paper suggests a decision support system for vehicle drivers, accessible via mobile phone. Concept behind the system is to help drivers to schedule their activities, best utilizing their time along the way, minimizing the impacts of traffic. This is in contrast to existing approaches focused on controlling traffic in highways. Vehicle is continuously tracked along the journey and information...
The “Reading Area Transport Information Network” project has been focused on the delivery of an enhanced unified communications network for Reading Borough Council using WiMax/Wi-Fi and on the use of the latest 3G communication capability to better deliver existing transport services and to provide a platform for the delivery of enhanced services in the future. The in-vehicle navigation sub-project...
The speed quick, the large volume of traffic highway has provided good convenient for the vehicles journey, but some especially heavy big accidents bring the life and property safety serious threat, the analysis on to the highway safe influence factors, pointed out the highway movement security is by essential factor constitutions and so on the human, vehicle, road, environment and management, analysis...
In order to improve the vehicle smoothness, the 3-DOF analysis physical and mathematical models of a vehicle and seat air-spring suspension system were established. Based on the linear stochastic optimal control theory (LQG), use the signal of road's output as excitation source to design the optimal law of this feedback control system. Application of MATLAB simulation programming language was designed...
The research reported in this paper is an empirical observation of driving behaviour on a sea-crossing bridge. A microscopic simulation model was validated using the observed data, which was used to investigate the traffic operation on sea-crossing bridges. It is believed that understandings obtained from the empirical modeling of driving behaivour are also applicable to many other large scale sea-crossing...
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