Using passive GPS as a means to improve spatial travel data: further findings.

Conventional data-collection techniques rely on respondents to report location, time, and distance of a trip. Respondents know few location addresses sufficiently well to permit accurate geocoding, and report perceived times and distances, not actual. GPS survey methodologies tested previously have relied on the respondent to enter information into a PDA as the trip is being made. This paper describes a passive method that provides equally good data, and is followed by a prompted recall interview for additional trip attributes that the GPS receiver cannot record. Data analysis showed that this method performed very well and has potential for full-scale surveys. (a) For the covering entry of this conference, please see ITRD abstract no. E206301.