Study On The Layout CNG Filling Station For Urban Traffic Impact Analyzing

With the shortage of petroleum resource and strict of emission regulations day by day, CNG vehicles which are the best alternative fuels vehicle have been generalized in the whole country. At the same time, the investment & money to CNG filling stations have been induced. However, as new development thing recent years, it is short of scientific and systemic theories for the layout of CNG filling station. The constructing of the station is out of place and eyeless at present, and CNG vehicle fueling flow focus on some roads overmuch. It has been arisen many outstanding problems: the traffic flow of the urban transportation network increase, the road crowd and jam, sometimes it results in the whole urban traffic imbalance. Therefore, traffic impact analysis(TIA) of urban CNG filling station which is profound practical significance in solving the urban traffic problems, can improve the urban traffic development & service level, advance urban structure for rationalization , assort with use of land and the transportation load, guarantee the urban construction healthy development.The thesis, using theory and method of TIA on urban land development for reference, which based on domestic and foreign relevant study experience, put forward the TIA of urban filling station and evaluation index & model. Main research results and features of the thesis are as follows:(1)TIA frame of urban CNG filling station is established. It analyses the interaction relations between CNG filling station and urban traffic, introduces the main contents and technique flow for TIA of filling station, and expound the character of CNG vehicle fueling station. It also sets up TIA system of urban filling station.(2) A new idea to determine TIA scope, which is the difficult question of the traditional TIA theory, has been put forward. Based on domestic and foreign relevant study experience, the thesis summarized four kinds of methods of advantage &disadvantage used TIA scope. Combined with the behaviors character of filling station influence for urban traffic, the qualitative &quantificational method to determine TIA scope is brought forward.(3)The prediction method of volume to be increased in view of CNG fueling station, which is based on the Grey Theory, has been applied. If it lacks the information carrying out TIA, such as traffic zone, OD data, matrix data of road network, four stages model couldn't apply. Basted on the orderliness of fueling behaviors, the grey theory is adopted to forecast urban CNG vehicle quantity, and then traffic volume of filling station is educed.(4) An integrated TIA evaluation index system of CNG filling station is established. The author follows the general step of system evaluation and the general principle to establish the index sign evaluation system, and sets up TLA index system of CNG filling station, and then expatiates to the meaning and standard of all levels evaluation index sign.(5)The thesis also discusses and analyze the establishing process of CNG filling station TIA evaluation model, and it is explained particularly that the method-improved hierarchy analysis process is used in ascertaining the index sign important degree .At the same time, in order to validate the accuracy of evaluation index sign and model, author evaluates certain CNG station around traffic status in Chengdu city, and put forward improvement opinion.