Application of the Combination of Random Utility Models (CoRUM) to route choice

The paper illustrates a route choice model based on the recently proposed Combination of Random Utility Models (CoRUM) model by Papola (2016). Specifically, the CoRUM specification with nested logit components, termed Combination of Nested Logits (CoNL), accounts for any correlation patterns amongst alternatives while keeping a closed-form expression for both probabilities and correlations. Thus, the paper illustrates a CoNL route choice model capable to target correlations between routes based on their topological overlapping, and characterized by a closed-form probability statement. The CoNL route choice model is operationalized by means of an algorithm providing automatically CoNL specification and corresponding route choice probabilities on a set of enumerated paths. Model performance is tested on various networks, with very satisfactory results.