Workshop A2: Non-response Challenges in GPS Surveys

Our Main Objectives In-depth discussion on non-response in GPS surveys Focused on methods and data collection Discussed barriers faced and strategies for improving non-response

Current Methods Used in Conducting GPS Surveys Sub-sample of the primary travel survey Most are regional Opt In / Opt Out Most are person-based using hand-held units Paper diary / travel log completed Many include a prompted recall Length of surveyed time varies Use of incentives is mixed Respondents are typically at least 14 years old Validation of diary data

Identification of Non-Responding Groups Low education Low income Elderly Low mobility Low technology Immigrants Disabled or individuals in poor health

Issues and Barriers to Participation Funding for testing and developing methods Conducting GPS surveys using traditional travel survey methodology Current multiple contact and recruitment stages have a negative impact on response rates

Issues and Barriers to Participation Characteristics of the equipment - life of GPS unit – need to be charged by respondents Privacy issues Fear of liability/losing the equipment Traditional barriers to participation

Strategies and Ideas Quantify burden Use GPS as an alternative to the travel survey or use the travel survey as an alternative to GPS Equipment that is familiar to people Equipment that provides incentives to people

Research Examine the interrelationships across non-response groups Clarify the reasons for non-response Develop best methods for recruitment Human factors Non-response effect on travel estimates Consider design elements that induce response (e.g. incentives)

Conclusions More research is needed Educate the public and decision-makers