A Refined Multi-path Traffic Assignment Method Considering Delayed Response

Under unrestricted traffic conditions, some information in the road network causes travelers have delayed response when making route choices. Consequently some travelers have to adjust their route choices more than once en route. But existing assignment methods failed to take into account this phenomenon. This paper analyzes the characteristics of the information causing delayed response (DRI) and the travel patterns under its influence. To quantitatively represent the influence, a study region is stratified to various regular or irregular rings as sub-areas where possible change in route choice may happen. And the traffic volume between an OD pair is segmented to reflect the possibilities of the travelers who adjust their route choices in the rings. Then a refined multi-path traffic assignment method is presented and some relevant issues are discussed as well