Abstract
This study attempts to evaluate the heterogeneous influence of driving propensity on driving intention on expressways under the provision of ITS-based and/or traditional traffic warning measures. An Internet-based questionnaire survey was conducted to collect relevant data including drivers' actual driving propensity and their stated driving behavior (i.e., driving intention) under different combinations of information provisions and existing safety facilities. Heterogeneity in the driving intention is taken into account by developing a latent class ordered-response probit model. As a result, it is confirmed that the warning information with voice and image through ITS technology (car-navigation) is a more effective measure than existing safety facilities to improve their awareness for safe driving; it is statistically confirmed that the developed model shows different driving intention by heterogeneities of drivers' driving propensities when same traffic warning information is provided on expressway.
