Collection of Time-Dependent Data Using Audio-Visual Stated Choice

Abstract

Purpose — A new method of collecting hurricane evacuation data using time-dependent stated choice is developed and evaluated in this study.

Methodology/approach — Hypothetical storms are presented in a video in a sequence of scenarios showing prevailing conditions at discrete points in time as each storm approaches land. Respondents are exposed to nine hypothetical storms representing a range of hurricane characteristics. One of the hypothetical storms is secretly the same as an actual storm the respondents experienced in the past and for which they are required to report their behaviour in a revealed preference survey.

Findings — Stated and actual behaviour was compared and general agreement was found between what people say they would do and what they did. The revealed preference (RP) data was supplemented with time-dependent data from official sources and hurricane evacuation demand models estimated on this enhanced RP data, as well as on a combination of the enhanced RP and time-dependent stated choice (SC) data. When the models were applied to a different data set than the ones on which the models were calibrated, the combined time-dependent RP/SC model performed slightly better than the enhanced RP model. Detailed accounting revealed that time-dependent SC data is 25 percent more expensive to collect than enhanced RP data, although some of this cost may be due to the first-time collection of this type of data.

Citation

Wilmot, C. and Gudishala, R. (2013), "Collection of Time-Dependent Data Using Audio-Visual Stated Choice", Zmud, J., Lee-Gosselin, M., Munizaga, M. and Carrasco, J.A. (Ed.) Transport Survey Methods, Emerald Group Publishing Limited, Leeds, pp. 507-522. https://doi.org/10.1108/9781781902882-028