In modem scientific conditions a lot of attention paid to the study of empirical methods for determining the factors influencing the process of deterioration of the road surface. A separate part of the interaction theory of road transport wheels with surface is the study of contact place, namely the parameters affecting its geometric characteristics, and coupling characteristics as a whole. There are a number of structural factors influencing the size of the place of contact. There are pressures inside the tire, tread pattern and vehicle speed.
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