文档介绍：英文
At present, many cities in our country exists the problem of heavy traffic, urban traffic problems have two main aspects: one is the city layout and road transportation capacity is insufficient, the supply shortage, On the other hand, because of the development of economy, the traffic demand increase. This requires using units per capita resource occupy road trip to alleviate traffic tools, increasingly serious traffic congestion, environmental protection, energy conservation has important significance. And because the bus with this advantage, alleviate the problem es possible to travel. Vigorously develop urban public transportation is ease traffic congestion in the first steps. Therefore, the development of urban public transport shall implement the bus priority of this concept. For the main urban public transportation, bus, the technology is improving its quality and level of user changes constantly meet vehicles and development.
With the development of society and the improvement of people's living standard, the development of urban public transport vehicle for the requirements from simple to the car fortable and clean and beautiful, quick, safe, convenient and environmental aspects of development needs. By bus priority and direction for the sustainable development in urban transportation, should meet the requirements under the optimum utilizing resources of traffic demand, and to improve the environmental quality of the three aspects.
In contemporary scientific development road, transport development is the necessary premise we human progress, because we have a faster, fortable, transportation, people have the efficiency of the development of the work now. So said traffic, everything changes in automotive field, this changes also exist. Now, the car is not only the main transportation, is also one of the best trends and fashion. According to concerning sectional statistic, the metropolitan transportation artery and NOx national standards, the more serious