The digitalization of data and the technolog-ical development of systems in the railway field offer count-less advantages, including the ease of reading, processing and transmission of the acquired data in order to increase the safety of the path. The following work aims to provide a method of investigation for the analysis of the coefficient of adhesion through the use of on-board sensors of a railway vehicle. The investigation is articulated with the theoretical and analytical knowledge of the wheel-rail contact and experimental results from bench tests, proposing a method of analysis that examines the running data digitized and acquired from real cases using the on-board train sensors pro-vided
