A misspecification test for logit based route choice models

The multinomial logit (MNL) model is often used for analyzing route choices in real networks in spite of the fact that path utilities are believed to be correlated. Yet, statistical tests for model misspecification are rarely used. This paper shows how the information matrix test for model misspecification proposed by White (1982) can be applied to test path-based and link-based MNL route choice models.