Five physical factors that hinders the development of railway transportation in nigeria
Distance, a core attribute of transportation can be represented in a variety of ways, [ [ ranging from a simple Euclidean distance - a straight line between two locations - to what can be called logistical distance; a complete set of tasks required to be done so that distance can be overcome. Any movement must thus consider its geographical setting which in turn is linked to spatial flows and
their patterns. The concept of flow has four major components:
Geographical. Each flow has an origin and a destination and consequently a degree of separation. Flows with high degrees of separation tend to be more limited than flows with low degrees of separation.
Physical. Each flow involves specific physical characteristics in terms of possible load units and the conditions in which they can be carried. Flows, depending on the transportation mode, can be atomized (smallest load unit) or massified (moving load units in batches).
Transactional. The realization of each flow has to be negotiated with providers of transport services, such as booking a slot on a containership or an air travel seat. Commonly, a flow is related to a monetary exchange between provider of transportation and the user.
Distribution. Flows are organized in sequences where the more complex are involving different modes and terminals. Many transport flows are scheduled and routed to minimize costs or maximize efficiency, often through intermediary locations.
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