For the IMTC passenger vehicle survey, the notion of a ―cross-border trip‖ is not as rigid a definition of ―trip‖ as typically used in traffic modeling. While basic origin and destination data was collected here, our purpose was not to obtain a trip diary from our respondents that would account for intermediary stops. Our interests were in the primary destination a traveler had when they left their residence and headed across the border.
BPRI, "2013/14 IMTC Passenger Vehicle Survey: Project Organization & Report of Findings" (2014). Border Policy Research Institute Publications. 93.