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In order to ensure high-reliability and high-security of the power supply for major politic, economic and culture activities, emergency power supply vehicle is often used to provide backup by power companies. Automatic Transfer Switch (ATS) is widely utilized to join the vehicle into power grid. The switching process lasts for a few seconds, during which power supply is shortly interrupted and the...
On purpose of scientifically and reasonably evaluating the present state of traffic safety, the improved Principal Component analysis and Cluster analysis are combined and the deficiency of existence of negative variation coefficient in Principal Component analysis could be made up by value assignment analysis. First of all, the synthesis evaluation indicators system is constructed based on nine relative...
Factors of suburban highway, such as oversized signalized intersection spacing, complex traffic composition, abundant exits and entrances along the artery, and low traffic demand always undermine the effectiveness of signal coordination. In order to decrease delay and number of stops on suburban highway, on the basis of bidirectional communication between vehicles and infrastructures in VII system,...
Vehicle Routing Problem (VRP) is not only a key in the logistics delivery, but also a Nondeterministic Polynomial Problem (NP Problem). This paper gives a new vehicle routing optimization model with two phases for Capacitated VRP. Firstly, by GIS route optimization and saving algorithm, we achieve automated intelligent logistics delivery. Secondly, distribution route was greatly Optimization by using...
Mixed traffic is often mistakenly considered as the cause of poor traffic safety and low efficiency. Traditionally, traffic management department would extend the signal cycle length to decrease the start loss caused by frequent starts, and to satisfy the traffic demand of motor vehicles, without considering the demand of pedestrian and non-motorized vehicles. Simultaneously, calculation methods of...
The conventional point-detector based method for travel time estimation does not consider the impact of future downstream traffic conditions and may deviate significantly from real travel times during congestion. Though many newly arising algorithms have been developed, it is difficult for them to be applied in real situation. This paper proposes a novel and easy-to-implement method of travel time...
This paper applies the principle of vehicle dynamics and traffic conflict theory to analyze the driver behaviors and speed of next two vehicles with green lights. Based on the analysis, we propose the smallest calculation formula of green change interval which ensure vehicles cross intersection safely. Combining with traffic psychology, we study the impact of signal countdown device to green change...
Signalized roundabout is an ideal traffic control mode for high traffic volume roundabout, it has be widely used at home and abroad and gained successful operational performance. For the absent of modern roundabout, the control mode of signalized roundabout in our country is not the same with the other countries. This paper commences with the origin and development of signalized roundabout, compares...
This paper develops a framework about how to solve the traffic count location problem. According to target scope, traffic count location problem can be divided into 3 categories: network count location problem (NCLP), corridor count location problem (CCLP), and link count location problem (LCLP). Programming method and micro-simulation tool are used to solve the related count location problem.
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