Large marshalling stations are the important element in the logistic chain linking the consignor and consignee. As a rule, such stations are located near large loading or unloading facilities, where cargo arrive under customs control. The problems in processing of carriage documents related to the customs formalities of cargo at marshalling stations are considered. In connection with the imperfection of the existing technology, the operating personnel at the station are forced to work irregularly due to delays in the processing of customs documents, and this significantly increases the idle time of wagons and reduces the rationality of use of the rolling stock. Currently, there is the urgent task of how quickly and efficiently to process the customs formalities of cargo at the marshalling station using logistic technologies for processing of information flow. Two main approaches to organization of work on the processing of carriage documents are compared: traditional and logistic. In the course of comparing of the variants, the main reasons of unproductive downtime in the processing of customs cargo carrying from Latvia to foreign countries by sea transport are identified. To predict the operations associated with the processing of carriage documents, it is proposed to use the dynamic model, which is based on scheduling theory in the form of the solution to the problem of the type “Flow shop” (flow line). Recommendations are given for optimization of the technological process of operation at the marshalling station to reduce time and financial costs. It is proposed to introduce the modern logistic and information technology in order to ensure the efficiency of operation of the marshalling station. It is concluded that modern logistic information systems can improve the productivity of station operation.