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The publication reflects the research results of the rationalization of the rolling stock use of JSC LG Lithuanian railways to increase the reliability indicators of the freight diesel locomotive exploitation reliability. The comparative evaluation of the exploited freight diesel locomotive work duration, according to the technical documentation, by using comparative test results and indirect diesel reliability criteria approved in practice. An algorithm of work duration forecasting methodology has been created, as well as a programme complex of mathematic modelling. The differences of the results indicated in the experiment and modelled by computer do not exceed 5 ÷ 7%. The proposed and described methodology of the diesel locomotive exploitation load cycle dynamic indicator reduction, by the use of which the following is achieved: increase of the diesel work duration by 7÷10%, reduction of fuel consumption up to 10%, reduction of the load cycle dynamic indicators (increasing the fatigue stress of parts and units of the diesel) by 15÷20%. [ABSTRACT FROM AUTHOR]

A mathematical model to select the best rolling stocks of trains is introduced. The parameters of income and cost of the passenger transportation by railways depending on the technical characteristic of used vehicles are thoroughly evaluated. The options how to reduce the cost calculated by a model in one of the specific routes of Lithuanian Railways are given and practical decisions are argumentatively given. [ABSTRACT FROM AUTHOR]

Performed data analysis aims to determine the number of rolling stock breakdowns and how it depends on rolling stock age, the number of passengers and operations. The mathematical model, stated below, analyses correlation between passenger fleet upgrade intensity and the number of faults. When planning to buy some new rolling stock (3÷6 wagons electric or diesel trains) while using this model, the number of faults can be predicted up to five years. [ABSTRACT FROM AUTHOR]

The analysis of the statistical data shows, that JSC "Lithuanian railways" existing passenger rolling stock is approaching the critical moral and technical wear limit. Passenger rolling stock analysis in detail lead us to create three possible rolling stock alternatives. The first alternative -- "Doing nothing option", in this case, JSC "Lithuanian railways" will not be doing any traction rolling stock renovation projects. The second alternative proposes "The new rolling stock option", that is the company renews traction rolling stock by buying only the new rolling stock. The third alternative offers "The new and modernized rolling stock option", that is the company modernizes the existing passenger rolling stock while buying the new one. Out of three passenger rolling stock renewing alternatives, the best according economic value criteria's would be "The new rolling stock buying and modernization option". [ABSTRACT FROM AUTHOR]

One of the major economic criteria is associated with the growth of maintenance costs of old rail vehicles. The research aims to determine the ageing criteria of passenger rolling stock, which could take into account fuel, diesel oil and repair costs. Therefore, economic criteria based on the above costs are generated and their comparative analysis is made. The research object is Vilnius locomotive depot. [ABSTRACT FROM AUTHOR]