Abstract: Based on the analysis of microcosmic environmental traffic capacity, the calculation model of environmental traffic capacity about the section of the highway is put forward through utilizing the box model of vehicle exhaust gas in this paper. In order to meet definite environmental quality criterion and achieve the highway capacity, reducing vehicle pollutant emission factor is took into account mainly, and its calculation model is concluded. At last, the environmental traffic capacity of a road in Beijing city is analyzed and calculated primarily. This model will offer some reference to the decision-making of urban planning, traffic planning and management.

Key words: urban environment, environmental traffic capacity, microcosmic environmental traffic capacity, pollutant emission factor

摘要： 在对微观(路段和交叉口)环境交通容量分析的基础上，运用机动车尾气扩散箱型模式建立路段环境交通容量计算模型。考虑满足环境空气质量标准和保证路段的通行能力，本文主要考虑降低机动车污染物排放因子，并得出了相应的计算模型。最后对北京某路段环境交通容量进行初步计算分析。该模型的提出可为城市规划、交通规划和交通管理决策提供参考。

关键词: 城市环境, 环境交通容量, 微观环境交通容量, 污染物排放因子