Traffic noise has a dominating effect on the acoustic climate of the natural environment.
Apart from properties of noise sources, the acoustic climate of the environment is affected to a large extent by the location of transportation facilities such as airports and industrial facilities together with the routes leading to them. The level of noise from road and railway vehicles measures from 75 to 95 decibels. The above values violate by several decibels the requirements specified for domestic producers by Polish safety norms. The allowable noise levels for the environment, set by other laws to a maximum level of 45 to 60 dB, are surpassed by as much as 12 to 37 dB. An important role in the shaping of the acoustic climate of the environment is played by the road network. The average road density for the whole country is about 50 km per 100 km 2 .