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NTTS 2009 Brussels 20/02/2009

Acceptability of the use of new technologies by interviewees in surveys Sophie Roux Jimmy Armoogum Philippe Marchal. NTTS 2009 Brussels 20/02/2009. Objective of the FNTS : knowledge of the mobility ( short and long distance trips) whatever the modes and the transport situations

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NTTS 2009 Brussels 20/02/2009

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  1. Acceptability of the use of new technologies by interviewees in surveysSophie Roux Jimmy Armoogum Philippe Marchal NTTS 2009 Brussels 20/02/2009

  2. Objective of the FNTS : knowledge of the mobility (short and long distance trips) whatever the modes and the transport situations Three main objectives: The knowledge of mobility (regular. local and long distance) Vehicle ownership and use (vehicle description, description of use of a vehicle for a week, possession of driving license, practice driving and accidents …) Accessibility to public transport The French National Travel Survey

  3. Overview of the French National Travel Survey (FNTS 2007-2008)

  4. Bias in transport surveys non response errors measurement errors (distance, minutes ...) description of the trips not exhaustive GPS-based surveys ... description of very short trips, which are often forgotten (walking) route choice (freeway, secondary road ...) precise information on access/egress time and waiting time ...but GPS has its drawbacks problem of signal reception (in the subway) problem of battery’s duration (load every day) problem with the interviewee forgot to take the GPS non response bias: which is maybe not the same that our classic survey. Transport surveys vs GPS-based surveys

  5. The interviewee volunteered to participate at this survey What are the reasons (socio-demographics or/and mobility behaviour) which push the interviewee not to want to answer at the survey by GPS? Question about the acceptability of the GPS component was asked. The possible answers were : Yes, without condition Yes, if it’s possible to turn it off Yes, but with other condition No 66% were answered “No” 28% were answered “Yes, without condition” Acceptability of the GPS component in the FNTS (1/5)

  6. Acceptability of the GPS component in the FNTS (2/5) With a logit model, 10 variablesexplain the non-response mechanism Diploma Age group Gender General health Number of trips (made the day before) Time of trips Number of days mobile Number of cars Number of long distance journeys Strata • Status matrimonial • Income • Number of person in household • Household car fleet • Household with computer • Household with web • Household with mobile phone • Household with TV

  7. Acceptability of the GPS component in the FNTS (3/5)

  8. Acceptability of the GPS component in the FNTS (4/5)

  9. Acceptability of the GPS component in the FNTS (5/5)

  10. The non-response mechanism for the GPS survey isn’t the same that for classic survey GPS is certainly a promising technology for surveying travel behaviour but raw data are not directly usable (traces are not segmented, there are missing segments) software packages must be elaborated Future analysis comparability with data from conventional survey Conclusion

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