Rippling effects of highway incidents on traffic flow, based on CA-simulation.

An analysis on rippling effects of bottleneck phenomenon caused by driving vehicles' breakdown or traffic accidents was conducted based on Cellular Automata (CA) simulation. The simulation modified Nagel-Schreckenberg's CA-rules to reflect traffic flow patterns of Korean highway in a stable moving stream. The length of traffic queue and dissipation time of queues at the bottleneck were measured, with the assumption that the incidents at the highway occur at the first lane and block the traffic flow for the first 10 minutes. The traffic situation is measured by incrementing 3% up to 21% density. Experimental results have shown that the queue length takes logistic curve with increases of density, and that the time to dissipate the queue increases in exponential curve. For the covering abstract see ITRD E114174.