Although many studies have explored the relationship between the built environment and travel behavior,the literature offers limited evidence about the collective influence of built environment attributes,and their non-linear effects on travel.This study innovatively adopts gradient boosting decision trees to fill the gaps.Using data from Oslo,we apply this method to the data on both weekdays and weekends to illustrate the differential effects of built environment characteristics on driving distance.We found that they have a stronger effect on weekdays than on weekends.