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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
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 transportThe French National Travel Survey
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
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
66% were answered “No”
28% were answered “Yes, without condition”Acceptability of the GPS component in the FNTS (1/5)
With a logit model, 10 variablesexplain the non-response mechanism
Number of trips (made the day before)
Time of trips
Number of days mobile
Number of cars
Number of long distance journeys
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
comparability with data from conventional surveyConclusion