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Railway transportation systems have been constantly improved to increase they transport capacity as an interconnection of two places. Today’s improvement emphasis is no longer solely on building railways to interconnect various places, cities or states. Other factors such as safe and clean driving, travel comfort, train-driver assistance, energy consumption reduction, and optimal usage of railway transport infrastructure are becoming more and more significant. Hence, to ensure optimal usage of railway transport capacity, intelligence is being added to its control systems. One of such intelligent control systems is the Moving Block technology. Train control methods based on Moving Block technology are known several years but still represent an undeveloped area regarding appliance of Railway Intelligent Transportation Systems. Namely, instead of currently used train control methods which imply train separation in fixed track blocks defined by their absolute braking distance on the certain railway line in Moving Block technology trains are following each other in the relative braking distance calculated for every specific pair of trains during their movement on the line. Usage of this train control method instead of traditional ones offers an additional possibility for improvement of railway transport efficiency especially by means of energy efficient train driving, improvement of timetable stability and track capacity. In this paper new possibilities of Intelligent Transportation Systems implementation within the Moving Block technology are presented and its applicability in high density railway lines control systems is analyzed.