1. Passenger Mobility Statistics 21 May 2015
Task Force on
Passenger Mobility Statistics
21 May 2015
Item 4.2 of the agenda
Survey Methodology
Eurostat Unit E3 - Transport

2. TF Passenger Mobility 21 May 2015
Contents
Introduction
Reference population & sampling
Survey methodology
TF Passenger Mobility 21 May 2015

3. TF Passenger Mobility 21 May 2015
Introduction
Guidelines offer recommendations for methodology and design:
For regular NTS execution
To help guarantee quality and validity of collected data
Based on definitions of indicators (cfr. item 4.1)
To streamline (post) harmonisation
Should be considered
As a starting point for countries without a proper NTS
As a reference point for countries with existing NTS with respect to quality & content
In light of practical and national considerations for NTS execution
Not a “holy book”, but a guideline to get started and to improve the comparability of results
TF Passenger Mobility 21 May 2015

4. Reference population & sampling
Reference population = country population
Mobility data collected from “mobile population”  reference population
Sampling frame & method
Frame: source population for subset: voting registers, census info, postal information, etc.
Avoid bias!
Method: probability (random, stratified, systematic) or non-probability (quota, convenience, judgment)
Sample size determines margin of error & confidence level
Suggested values:
Margin of error:  5%
Confidence level: 95%
TF Passenger Mobility 21 May 2015

5. TF Passenger Mobility 21 May 2015
Survey Methodology
Collection methods for household & individual sampling:
PAPI: Paper and Pencil diary
CATI: Computer Assisted Telephone Interviewing
CAWI: Computer Assisted Web Interviewing
F2F: Face to Face interviewing
Automated collection via new technology:
Smartphones
GPS trackers
Mixed method: traditional PAPI diary + automated collection
Most promising (completeness, ease of use)
Risk of bias (tech availability)
Privacy issues
Cost?
Multi-day panels: only 3/15 countries – rest: one day reference periods
TF Passenger Mobility 21 May 2015

6. TF Passenger Mobility 21 May 2015
Survey Methodology
Reporting period
Single day or multi-day
Single or repeated participation
Repeated, multi-day gives best results
Days of week, time of year
Representative selection is needed (week vs weekend, holiday periods)
Timing
Continuous  annual  less-than-annual
Continuous avoids time period bias
Monitoring of policy is difficult with less-than-annual
Consistency checks
Internal checks (e.g. Pkm = vkm * occupancy rate)
External checks with non-linked databases
Multi-day panels: only 3/15 countries – rest: one day reference periods
TF Passenger Mobility 21 May 2015

7. - Thank you for your attention -
TF Passenger Mobility 21 May 2015