GPS and Travel Survey Data
The empirical analysis in the current paper uses data extracted from the Kansas City Regional Household
Travel Survey that was conducted in Spring 2004, under the sponsorship of the Mid-America Regional
Council and the Kansas and Missouri Departments of Transportation. As part of the Kansas City survey,
complete demographic and travel behavior characteristics of 3,049 randomly sampled households were
obtained, including details about 32,011 trips for 7,570 household members. The GPS component of the
study involved equipping the vehicles of 294 households with GPS equipment to record all vehicle travel
during the assigned travel period. Of the 294 households, both CATI and GPS data are available for 228
households. All subsequent analyses in the current paper focus on these 228 households, corresponding
to 377 drivers and 2,359 vehicle trips. (For more details regarding the characteristics of these GPS
households as compared to the general survey participants as a whole, see NuStats 2004).
Of the 377 drivers, 269 (or 71 percent) accurately reported all travel in their CATI survey, while
108 (or 29 percent) had at least one instance of a trip that was not reported.2
Among the 108 respondents