The article deals with the issues of transport processes of industrial enterprises. A review of scientific research in the field of rationalizing idle time of wagons at industrial railway transport enterprises has been carried out. A statistical analysis of observations of idle cars on the access roads of the direction of RRJ-T JSC "UTY" was made. An element-by-element analysis of the idle time of cars on access roads was carried out using the criterion of V.I. Romanovsky.