To the issue of the soil freezing process from the point of view of mathematical modeling

State Inspectorate for Road Traffic Safety results statiscic that noted a significant increase in the total number of road accidents in the Perm region. Disrepair jf the roads is the reason of road accidents. Condition of the soil affect the condition of the roadway. Perm region has a meridional type of structure in terms of geology. Dominated soils of alluvial origin. Perm region refers to areas with high soil moisture in some years and abundant moisture of soil. The main cause of the destruction of the roadway in the region is frost heave. Frost heave of soil - the process of increasing the volume and strain -grained soils during freezing and formation convex forms on their surface. The process of freezing ground from the point of view of mathematical modeling. This mathematical model shows the dependence of the rate of frost penetration of moisture.