The aim of this paper is to discuss about speed of transports as a research subject in Iron Age archaeology. Introduction presents a selection of data gained in the written sources, about speed of the messengers, pack animals, vehicles and boats, from Antiquity to Modern period. This selection shows us that the speed of the people and of the various means of transport always remained the same. The author thus concludes that data about reached speed or length of the daily steps may also be used for Iron Age. The author then discusses the different factors that fundamentally influenced the time necessary to cover the distance between two points in the landscape. According to their importance, they are ranked like this: motivation, organisation, orientation, nature of the terrain, roads, means of transport and season/weather. In the conclusive part, the observations collected are used to modelize the import of salt in the second Iron Age Bohemia, where number of inhabitants may be estimated to ca. 200 000 people, who had to import all the salt they needed. The model thus built up shows that importation of salt had to be well organized and that a consequent number of people had to participate in. In conclusion is formulated the belief that speed of transports can be a legitimate research subject for prehistoric archaeology also.