Modeling of a road network with pre-announced temporary closures

Abstract

A traffic assignment model was constructed to generate dynamic user-optimal routes for all trips in a congested capacity-constrained road network. The space-time network model was formulated consisting of nodes and links in which spillbacks and delays based on a first-in-first-out queuing discipline are captured explicitly. In this model, links are constrained by a spatial capacity governed by a specified jam density. If this spatial capacity is not exceeded or if the link is not closed, vehicles travel at a speed which is dependent on the instantaneous vehicle density, otherwise vehicles are spilled back to an upstream link. By recording the cumulative arrival and departure patterns at a link, time-dependent queuing delays can be estimated.