但是，城市室内环境由于受到各种化学和生物因子的污染，因而在很多情况下，其室内污染物程度比室外还要严重，据澳大利亚的学者认为：室内空气的污染程度超过室外5～20倍，且不良的室内空气会引发许多的疾病，例如病态建筑综合症（Sick Building Syndrome，SBS）、建筑相关疾病(Building-related Illness, BRI)和化学物质过敏症(Multiple Chemical Sensitivity, MCS)等。因此，室内空气污染已列为影响公众健康的世界五大危害之一。

因此，本文将选取受到污染大以及污染源较复杂的军工路与控江路交叉口旁边、杨浦大桥浦西引桥旁边的室内外空气为对象，对空气污染物进行实地采样和分析，找出交通主干道旁的室内外空气污染物的主要成分、浓度及其变化规律。

在上述基础上，运用灰色系统理论中的灰色关联空间对军工路与控江路交叉口室外空气污染物浓度与交通流量的关联度进行分析，获得交通流量对室外空气中污染物浓度的影响程度，从而进一步分析城市交通主干道旁室内外空气污染物的相关性。

最后，根据现有的单房间模型，对军工路与控江路交叉口旁边的启明楼酒家二楼客房室内的NO2污染物浓度，进行数值计算，以验证其现场监测数据。

But, indoor air pollution is more serious than outdoor, especially the buildings beside the trunk road, which is due to the impact of the various pollutant chemical compounds and biological particles. The Australia researcher study concluded that indoor air pollutants concentrations are from five to twenty times more serious than outdoor. And the bad indoor air quality would lead to a variety of sickness, such as Sick Building Syndrome (SBS), Building-related Illness (BRI) and Multiple Chemical Sensitivity (MCS) , and so on. Consequently, indoor air pollution has been one of the five hazard which affect the public health in the world.

Therefore, air samples in the present dissertation are taken from two seriously polluted sites, which have complex pollution sources. One is located beside the crossing of Jungong Road and Kongjiang Road, the other is beside the Yangpu Great Bridge approach. Study on the measurements and analysis of air pollutants concentrations was carried out. Then the dissertation discusses the main varieties, concentrations and the change rules of indoor and outdoor air pollutants beside the trunk road.

Then, Grey Relation Theory is applied on this analysis on the correlativity of outdoor air pollutants with the traffic flow. The degree of air pollutants concentrations effected by the traffic flow is obtained. Thereby, the dissertation further discusses the relationship of air pollutants concentrations between indoor and outdoor along the city trunk road.

Finally, based on the present single-compartment model, the dissertation used the model to calculate indoor nitrogen dioxide (NO2) concentrations in the guest room of the Qiming hotel. The indoor-model concentrations validate the measurement concentrations.