Acceptability of the use of new technologies by interviewees in surveys Sophie Roux Jimmy Armoogum P

1
Acceptability of the use of new technologies by
interviewees in surveysSophie Roux Jimmy
Armoogum Philippe Marchal
NTTS 2009 Brussels 20/02/2009
2
The French National Travel Survey

• 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

3
Overview of the French National Travel Survey
(FNTS 2007-2008)
4
Transport surveys vs GPS-based surveys

• 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 batterys 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.

5
Acceptability of the GPS component in the FNTS
(1/5)

• 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 its possible to turn it off
• Yes, but with other condition
• No
• 66 were answered No
• 28 were answered Yes, without condition

6
Acceptability of the GPS component in the FNTS
(2/5)

• With a logit model, 10 variables explain the
  non-response mechanism

• Status matrimonial
• Income
• Number of person in household
• Household car fleet
• Household with computer
• Household with web
• Household with mobile phone
• Household with TV

• 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

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
Conclusion

• The non-response mechanism for the GPS survey
  isnt 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