桥头交叉口引道运行状况与排放关系研究

Research on relationship between operation condition and emission of bridge intersection approach

以福州市桔园洲大桥(建平路)与旗山大道交叉口的南进出口道为研究对象,选取交通运行参数(进口道的交通流量流向、出口道的流量)和交通排放数据(PM1、PM2.5、PM4、PM10和总悬浮颗粒物TSP)为实测指标,分析该进出口道与颗粒物体积分数、距停车线位置与颗粒物体积分数,以及交通运行与排放的关系,利用Matlab等软件进行数据关系拟合.结果表明,车辆排放和运行工况影响紧密;PM1、PM2.5和PM4体积分数变化趋势类似,且与交通运行参数的相关关系亦类似,而PM10和TSP体积分数二者亦然;越靠近停车线,PM体积分数波动越明显;PM体积分数与车流量的关系并非是完全的正相关.

The south inlet and outlet road of the intersection of Juyuanzhou bridge （Jianping road） and Qishan avenue located in Fuzhou City was set as research object, and the traffic operation parameters （traffic flow of the inlet and outlet road） and traffic emission data （PM1, PM2.5, PM4, PM10 and TSP） were used as the measured indicators in order to ana- lyze the relationship between the inlet and outlet road and particulate matter （PM） concen- tration. The different distance from the stop line and PM concentration, the traffic operation and the traffic emission, Matlab and other softwares were used for data relationship fitting. The results showed that the vehicle emissions could be closely affected by the operating con- ditions. The change trend of PM1, PM2.5 and PM4 concentration could be similar, and traffic operation parameters related to them could be similar. While PM10 and TSP concentration could also have the same relationship, the smaller distance from the stop line is the bigger wave of the PM concentration could be. The relationship between PM concentration and vehi- cle flow couldn＇t be completely positive correlation.