The purpose of my study. The main target of my study was to survey the golden age of the Hungarian narrow-gauge railways from the and of WWII until the Transport Policy Concept of 1968. Beside the survey, I examined the impact of the Transport Policy Concept of 1968 on the narrow -gauge railways, especially at the Szerencs-Prügy narrow-gauge railway. Applied methods. Literature review including the history of the Hungarian narrow-gauge railways in the time frame of World War II and 1968. We involved sources from monographies, our own data from researches of archives, especially from MÁV Archive, and local newspapers of the above mentioned period. Outcomes. After WWII ended, notable narrow-gauge railway constructions begun, so we can call apostrophe the quarter century as the second golden age there history, however from the early 1960’s the communist regime did not sympathize with narrow-gauge railways (New Economic Mechanism in 1968). Therefore the railway system, which was more than 5000 kilometres long before, constantly began to diminish. Nowadays only 5% of the original system has left (245 kilometers) and today narrow-gauge railways – beside four lines - have only touristical funtion. Economic policy recommendations. With the implementation of the transport policy concept, 30% of the low-traffic lines and stations were closed by diverting their traffic to the road. These measures have done a lot of damage to domestic transport. The rate of closure of the sidelines was well above the level of similar measures of the European railways, but the road development did not take place to the extent planned and the loading engineering and other development measures necessary for the successful implementation of the concept were largely cancelled. The leftover railway network could not become an engine for the development of transport, its performances decreased and road transport took over the tasks of the railways even in areas where the railway proved to be more uneconomic.