IEEE Transactions on Intelligent Transportation Systems
We present a novel analytical model to approximate the travel-time distribution of vehicles traversing a freeway corridor that experiences random quality of service degradations due to non-recurrent incidents. The proposed model derives the generating function of travel times in closed-form using clearance time, incident frequency and severity, and other ordinary traffic characteristics. We validate the model using data from a freeway corridor where weather events and traffic accidents serve as the principal causes of service degradation. The resulting model is equivalent in performance to widely used methodologies while uniquely providing a clear connection on how incidents affect travel time distribution. With this connection, the model readily yields travel time reliability measures for alternative roadway behaviors, providing crucial information for long-term planning.
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Baykal-Gürsoy, Melike; Benton, Andrew Reed; Lopes Gerum, Pedro Cesar; and CAndia, Marcelo Figueroa, "How Random Incidents Affect Travel-Time Distributions" (2021). Supply Chain Management. 1.