Abstract
A flow network should be studied for evaluating the reliability of a degraded road network, in which the inconvenience of travel may bring the reduction of travel demand and network flow pattern may change. This paper aims to show reliability measures of an origin and destination (OD) pair in a road network when some links are possibly damaged by natural disasters and may be closed to traffic. The UE model with variable demand and strict link capacity constraints is applied to describe flows in a network with some disconnected links. An approximation algorithm is proposed for estimating the cumulative travel time distribution between an OD pair. Small scale examples are calculated to test the performance of the proposed algorithm.
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