Traffic-related pollutions, apart from the emissions from other anthropogenic sources, significantly decrease the air quality in cities. This is especially true in the case of the areas located in the vicinity of communication routes with high traffic intensity. In accordance with the epidemiological studies, the transport emissions affecting road users, both drivers and pedestrians, have a detrimental effect on health and may contribute to numerous serious illnesses. This work presents the characteristics of traffic-related pollution and the factors affecting its concentration in the air. The effects of exposure to traffic-related pollution on health are described as well. The transport emissions in Lublin, Poland, are discussed in detail. The results of previous studies on traffic-related environmental pollution are presented, including pollutant concentrations as well as exposures of drivers and pedestrians along one of the busiest roads. The studies account for different seasons and weather conditions. The methods of reducing traffic-related pollution and prospects for improving the urban air quality are described as well. This book is intended for academics, researchers, engineers and professionals involved in studies and assessment of the road transport impact on the environment.