Acceptability of the use of new technologies by interviewees in surveys
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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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Slide1 l.jpg
Acceptability of the use of new technologies by interviewees in surveysSophie Roux Jimmy Armoogum Philippe Marchal

NTTS 2009 Brussels 20/02/2009


The french national travel survey l.jpg

Objective of the FNTS : in surveys

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



Transport surveys vs gps based surveys l.jpg

Bias in transport surveys 2007-2008)

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


Acceptability of the gps component in the fnts 1 5 l.jpg

The 2007-2008)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)


Acceptability of the gps component in the fnts 2 5 l.jpg
Acceptability of the GPS component in the FNTS (2/5) 2007-2008)

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





Conclusion l.jpg

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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