Abstract
Abstract Sag sections, which are road structures comprising a downgrade section followed by an upgrade section, frequently become a bottleneck on freeways. It is therefore highly desirable to devise methods of mitigating traffic congestion in sag zones by means of vehicle-to-vehicle (V2V) or Vehicle-to-X (V2X) communications technologies as well as through improvement of road alignment. Simulation-based investigation is a useful measure for identifying the optimal control scheme for connected and autonomous vehicles prior to field experiments. Indeed, microscopic traffic simulators representing sag bottlenecks have been developed, but these were constructed for the purpose of a single research project, which is not a cost-efficient approach. If sag bottleneck phenomena could be faithfully represented by way of a commercial microscopic traffic simulator, more research attention would be attracted to this issue. In this contribution, we present a process by which sag bottleneck phenomena can be represented with one of the most popular commercial microscopic traffic simulators, VISSIM, which allows the longitudinal gradient of a freeway sag section to be set as a control variable.
Published Version
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