Adhesion of car tires to the road surface during reconstruction of road accidents

Abstract

Road and weather conditions have a significant impact on the occurrence of road accidents and their development as events. According to these circumstances, the system “Driver – Car – Road – Environment” identifies certain types of expertise that are engaged in determining the presence and magnitude of the parameters of the road environment that affect the development of the road transport situation. When conducting relevant investigations, the experts calculate the speed and length of the stopping distance of the vehicle, using coefficients that determine the impact of road conditions on the road traffic situation under study. One of these important indicators is the coefficient of adhesion of car tires to the road surface. Due to the lack of technical capability to experimentally determine the coefficient of adhesion at the place of an accident, many experts are forced to use values from the reference literature. This study is devoted to checking the agreement of reference values of this indicator with actual values that correspond to the conditions of driving on Russian roads. To solve this problem, full-scale measurements were made of the coefficient of adhesion of tires with a coating on more than 2000 km of roads in different regions of Russia (with different climatic and topographic conditions) and the results of field research were analyzed.

Optimization of Joint Decision of Transport Mode and Path in Multi-Mode Freight Transportation Network

“…Other independent factors that affect the transport processes and cannot always be directly included in the model could also be considered. Those factors could be the kinematics of vehicle movements [27,28] and local infrastructure that affects the ability to move vehicles [29][30][31], which affects vehicle driving safety [32], as well as the time of road transport services. For example, overcoming obstacles on the road [33] and the impact of the suspension or the strategy of making decisions [34,35] are highly related to the risk of a reduced coefficient of adhesion [36,37], e.g., under snow-covered road conditions.…”