Bulgaria's accession to the European transport system and its strategic geographical location has imposed the necessity of a high-level operational reliability in the rail sector. With particular urgency and profoundness, in relation to the commitments stipulated in the regulations of the European Parliament (Directive 2001/14/EC on the allocation of railway infrastructure capacity and the levying of charges for the use of railway infrastructure and safety certification and EN 14363: 2005 E 'Railway applications – Testing for the acceptance of running characteristics of railway vehicles – Testing of running behaviour and stationary tests'), the problem to develop systems for monitoring on the national railway infrastructure has become a priority. The mandatory implementation of control systems for trains in movement should create conditions for continuous objective monitoring on the transport process. It will result in providing traffic safety and preventing accidents as well as in a number of other effects such as increased economic efficiency in operation and maintenance of infrastructure and rolling stock, allocation of railway infrastructure capacity and collection of charges, etc. This paper developed by scientists working in the field of diagnostic equipment to determine the technical condition of the most important vehicle undercarriage elements is intended to interested public. A detailed study and comparative analysis of the systems used by leading railway administrations have been made. The basic principles of the construction are examined and Check PointBG functions related to its regional purpose are determined. Alternative methods have been proposed, which concern the nature of vehicle–track interaction, hence traffic safety. A number of diagrams experimentally established under conditions similar to real operational environment are presented. Some peculiarities in measurement defining the conditions necessary to model the Bulgarian control system of trains in movement are shown.

movement of train, control systems for trains in movement