A System Equilibrium Model for Economic Policy Analysis of National Inland Waterways Navigation. GEM 1,
ARMY ENGINEER DISTRICT ST LOUIS MO
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Economic benefits of navigation projects consist of two components, transportation savings and lock delay reductions resulting from navigation improvements. When demand for lock usage exceeds the available supply of the lock, some traffic cannot use the lock. In particular, as the amount of traffic passing through a lock increases, delays at the lock increase due to increased levels of congestion. This raises the cost of transportation on the waterway. At some point the increased costs will exceed those of some alternative mode for some movements, and shippers of these movements will find it more economical to use an alternative transportation mode. This paper includes a model description, sample input data, test case, and mathematical description and proof of systemic equilibrium.