【正文】 traffic congestion. In this paper, on the basis of the analysis of BRT intelligent transport system, effectively relieve urban traffic congestion. 2 Analysis of City Bus Status Longterm since, by bus system, construction, operation management, an fares aspects of factors, bus priority hair exhibition to effectively implement policies failed. Bus service level is not high, the attraction is not strong, motorcycles and cars, buses and private petitive power is weak. Longterm since the people did not bee major public transportation. Public transportation is the main reason for the lost their appeal in the following aspects: 1) take bus no By bus is not convenient to transport the main cause less attractive. Take bus no convenient mainly displays in transit work and the site layout is reasonable, departure intervals, residents of travel by bus in the long walk outside, the car for a long time, change into more, make passengers inconvenience. 2) of time cannot be guaranteed by bus to work, most of the school trip, and work to reach the destination, the school of time, but the bus to work in the peak hour traffic junction obstruction and often due to excessive time delay, and to ensure that sex is part of the trip shunt to other travel more time. 3) the bus service quality low as people living standard rise, to travel fort put forward higher request, the condition is poor, bus seat rate is low, slow, cannot satisfy the requirement of fort. ZhunDianLv low, the crowded, waiting for a long time, the overall service quality is not high. According to the nanjing, suzhou, wuxi, yangzhou city residents, passengers traveling intention survey of public service satisfaction of main reasons include: car too crowded, driving unpunctuality, waiting time is too long, transfer inconvenient, etc. These problems caused by the reasons, one is bus itself circuit layout, vehicle scheduling unreasonable, on the other hand, is a road traffic condition and operation management of serious and didn39。t give any bus priority cuo, bus operation environment deterioration. 31 3 Bus Priority Development of Necessity The Social Justice The aim is to realize and transportation of moving vehicles, instead of moving bus priority is the priority, said the bus passengers to bottom is people first, and efficiency first, rather than simply for vehicles, accord with the fundamental interests of the masses. Public transportation is the people39。s government of the city for people with direct line service was an important infrastructure, it will manifest distinct pro bono ten. Public traffic facilities, market management standard, management services, such as the civilization degree directly affect people39。s quality of life. Bus priority is the priority masses is an important task. Compared with private bus priority traffic, the majority of the interests, especially for lowine provides enjoys transportation, enjoy the rights to the urban road traffic facilities, reflect the urban road traffic development, make sure the impartiality of the most people get equal rights of traffic. Economic And Rational Compared with cars, DianQiChe public transportation, ZhanDao less, high efficiency, energy saving, environmental pollution, the general way into small private space in the road, and occupy the discharge of pollutants, several times, but also public transit passengers between when the delay. These will increase the marginal cost, give public bus travel by the most economic losses. Bus Priority to Save Road Resources According to the statistics, the reasonable resources are cars, buses times a big car ZhanDao area is less than two cars and passenger quantity is two cars around 40 times. With the acceleration of urbanization, motor vehicles will be fast growth, traffic ownership of land will be gradually increased, in our country land resources under the condition of tension, high efficiency of road traffic mode for sustainable development in our country Bus Priority to Save Energy The acceleration of urbanization, the ownership of rapid growth, motor vehicle traffic system will be the proportion of consumption of resources will also increase 32 year by year, the contradiction of supply and demand will increasingly prominent. Traffic system of land, such as fuel nonrenewable resources, the serious will be excessive reliance of ring city sustainable economic development. Therefore, to optimize the nonrenewable resources utilization of urban transportation system is established, the implementation of the strategy of sustainable development of urban traffic is necessary. In the rush hours, according to each of the energy consumption per kilometer is: bus for the car for cars, trolley percent of 4%, trams for the car for a car, subway percent. At the same time, the bus pollution to the environment is lesser, therefore also for the car than cars on public transportation development of urban traffic has more advantages. 4 The Connotation of Bus Priority The Connotation of Bus Priority The city bus priority refers to the passenger traffic in large capacity, fast speed of large public transport system, to work with other traffic supplemented by means of transportation. Is a kind of traffic development strategy, rely on engineering, management measures and corresponding policies, laws and regulations, to provide fast, convenient and economical, fortable, safe travel environment. From the general understanding, refers to the benefit of public transportation development that all policies and measures, is from the city planning, investment, tax policy, traffic management and technological progress in many aspects, such as urban public transportation development priority, Daniel from the narrow sense means in traffic control solution within the scope of management, public traffic vehicles on the road, refers to the rightofway measures of urban transportation planning and the bus lanes, or cut ZhuanYongLu. Public transportation is a basic contains two aspects of public support is, Two is to other way (mainly the car). Supported by various means is to develop urban public transportation, increase speed and improve service quality, ensure its economic investment, In other ways to limit is purchased, using different link control in order to reduce the impact on public transport. 33 Analysis of Main Transport Mode Public transportation mainly include: conventional ground transportation (bus, trams, including taxi) and urban rail transit (metro rail), and detail below. Urban Rail Transit Urban rail traffic light, mainly includes the subway. For example, by subway, the maximum capacity of the main advantages of area at least, fast and low pollution, as a largecapacity, rapid and fortable bus system framework, economic benefit, metro is the good choice, is the best city traffic of longterm way. The main disadvantages: built a