交叉口交通设计的环境效益分析方法研究

Research on environment effects in traffic light control intersection design

以典型城市干道交叉口为分析实例，采用理论分析和实测方法，研究交叉口环境空气质量与交叉口交通流量和停车延误的关系、交叉口环境空气质量指标的预测方法和交叉口交通设计环境效益分析方法，预测交叉口改进交通设计后环境质量效益。

The demonstrative study shows that air quality in the vicinity of heavy traffic intersection may be improved by traffic design scheme, including traffic light timing, lane configuration. The work was conducted in one traffic light control intersection downtown Shanghai. Both CO and NOx concentrations are measured at roadside pedestrain in the eastern approaching lane. Meanwhile traffic flow parameters are counted. The monitored results give a good inside understanding of relation between emission and traffic flow parameters. Both CO and NOx monitored concentrations are roughly proportional to traffic delay, whereas traffic density has little effects. Improving traffic design can reduce the concentration to roughly 30% for the particular case on the condition that coming flow and atmospheric parameter remain unchanged.