Choice probabilities and correlations in closed-form route choice models: Specifications and drawbacks

This paper investigates the performance – in terms of choice probabilities and correlations existing new specifications closed-form route models with flexible correlation patterns, namely Link Nested Logit (LNL), Paired Combinatorial (PCL) more recent Combination (CoNL) models. Following a consolidated track literature, Multinomial Probit (MNP) model by [1] are taken as targets. Laboratory experiments on small/medium-size networks illustrated, also leveraging procedure for practical calculation any GEV models, proposed [2]. Results show that inherent limitations coverage domain feasible yield unsatisfactory performance, whilst CoNL appear best fitting both MNP probabilities. The is appreciably ameliorated introducing lower bounds to nesting parameters. Overall, provides guides application tested