Urban transport has become a more significant source of the pollution of environment. The environmental problems have two aspects: local and global. Local environmental problems include air pollution and noise. As for instance, diesel engines are significant contributors to air pollution. Some of the basic types of exhaust have a strong obnoxious impact on live organisms. They include cancer-causing substances and also contain other harmful pollutants. Even if all-electric suburb railway transport does not have effect on air pollution, they are the source of noise pollution. From the point of view of a global environmental problem, a great part of total greenhouse gas emissions are mainly caused by urban transport, especially road transport. At this point, environment friendly urban transport systems have a crucial role in saving environmental quality.