Research On Key Technologies Of Traffic Control In The Downtown Area Of Kunming

In recent years, with the rapid development of social economy and the promotion to international level of the city whole function, Kunming has obtained more and more international social acceptance. Kunming's development goal is regional international city. However, cars quantities continue to increase, and the traffic demand sharply increase, all this leaded to Kunming city traffic problems worsen sharply, serious traffic jam and unprecedented traffic pressure. To cope with the development of city traffic pressure, Kunming related department increased transportation infrastructure investment year by year, and carried out a lot of infrastructure construction and renovation project. All these measures relieved parts of the urban traffic congestion problems. But because the structure of traffic network is not reasonable, and total demand is growing rapidly, the total quantity of motor vehicles and the demand of traffic are rising much faster than Kunming transportation infrastructure growth, still, add basic transportation construction cannot fundamentally solve urban traffic congestion problems. Therefore, in view of existing urban road network status of Kunming, combined with the future urban development planning needs, use modern city traffic organization optimization, traffic control to reduce or even eliminate urban traffic congestion and relieve city traffic pressure from the two aspects of time and space.This paper is aimed at Kunming city existing road traffic conditions, without any increase in foundation transportation facilities, analyses the traffic OD demand, travel features and the characteristics of network structure, and study the traffic control method for Kunming. This research mainly relys on "Kunming city road traffic organization and control integration theory and method research and demonstration applications", and the main content of this paper are as follows:(1) Introduction. Firstly, the paper introduced the traffic and urban road network characteristics of Kunming. And this drawned the main purpose and significance of traffic control technlogy in Kunming city, and puts forward the thinking, research framework and chapters arrangement. (2) Route traffic coordination control technology of Kunming city. For the characters of the City of Kunming'trunk road, firstly this paper introduce the theory of traffic truck road coordination control, based on these theory analysis the division approach of the traffic control work zone in detail. then this paper proposed a model of one-way green wave coordination control based on fuzzy neural network, from the optimization of the cycle, phase and split of intersections. Then by analyzing the control objectives of the two-way green wave coordination control, starting from the intersection delay, proposed a model of two-way green wave coordination control. At last, this paper analysis the impact assessment methods of the traffic truck road coordination control based on Analytic hierarchy process.(3) Bus signal priority control technology of Kunming city. This chapter proposed a urban travel mode based on public transport priority development,and give the various control measuers for ensuring the travel priority of the common bus and BRT. The control strategy of the common bus contains the space and the time two aspects,and a prior inductive evacuation bus singal control strategy was put forward which is can be used for border crossings in condition of fixed timing.At last,a adaptive inductive control strategy was proposed based on the bus arrived time and the change of the crossing traffic flow disturbances degree. Bus induction signal trigger threshold as followed (TV1,TV2,TV3). In the control strategy of the prior bus travel right, on the space,it would optimize from the steering traffic processing, traffic flow restrictions, import set, line distribution;on the time,it could realize the measures from three aspects:passive priority control, active priority control and real-time priority control.(4) Elevated freeway traffic and ground traffic collaborative linkage control technology of Kunming city. Taking the expressway management and control status of kunming as a background, chapter four studied the kunming expressway traffic flow macro properties, microscopic characteristics and the intersection lots traffic flow characteristics based on the kunming expressway entrance ramp, exit ramp and the correlation crossing field detected data. From the overall benefit of the road network, the paper proposed the expressway entrance ramp, exit ramp and the correlation crossing coordination management and control strategies and models based the ALINEA and LWR model and finally took the field test and application under the background of stone-brake overpass peripheral expressway in Kunming. The actual operation effect showed that:the proposed expressway traffic coordination management and control technology has good practical significance and application value.(5) The traffic signal control and variable information boards route guidance synergy optimization technique. Comprehensive analysis of variable information board information structure, the source of information, information release principles and information update interval, in-depth understanding of variable information board network traffic flow, the influence mechanism and function mechanism. On this basis, considering the control strategy of driver path choice behavior exist by increasing traffic impact, the traffic control strategy variables, control strategy for routing influence into account, putting forward the traffic signal control induced consistency with the VMS route guidance collaborated optimization model and adopting micro traffic simulation tools VISSIM simulation modeling and analysis.(6) Conclusion and prospect. This part makes a comprehensive summary, and points out the existing limitations of the study and the paper further research work of prospected.