Modeling the Formation of Trip Chains Using the Household Activity Plans

 The activity plans of individuals and their characteristics play an important role in transportation models and realated travel behaviors. Therefore, considering people individually without taking into account their role in the household and the effects of other household members on them reduces the accuracy and validity of transportation models. Therefore, in this paper, two separate models were developed, in one of which the individual was in the form of a household, and in the other, each household was considered as a decision-making unit. The data used in this paper was from a Washington household survey. The models were the multinomial logit in which the daily activity patterns of individuals were once considered to form a trip chain of individuals using the household activity plans and again for shared trips of households to calculate the utility of possible choice options for each individual and household and compare them with other options. The trip chain formation model was built with seven activity objectives of "work, education, companionship (escort), personal work (self-employment and virtual work with phone and internet), shopping, food, and social/recreational" and variables in categories of "type of individuals, age group, household income, household composition, gender/child," and the shared trip model was built with three types of activity patterns of "work, education, companionship (escort), personal work (self-employment and virtual work with phone and internet), This kind of behavior in the home and with other people will definitely have a big effect on how realistic the models are and, as a result, on progress and growth in the transportation planning.