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COST 355 WG3 Synthesis of Continuous and Panel Surveys

COST 355 WG3 Synthesis of Continuous and Panel Surveys . Tobias Kuhnimhof Institute for Transport Studies, University of Karlsruhe COST 355, Annecy 2008-05. Agenda. Discussion of Terms Advantages of Longitudinal and Continuous Surveys Problems of Longitudinal and Continuous Surveys

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COST 355 WG3 Synthesis of Continuous and Panel Surveys

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  1. COST 355 WG3 Synthesis of Continuous and Panel Surveys Tobias Kuhnimhof Institute for Transport Studies, University of Karlsruhe COST 355, Annecy 2008-05

  2. Agenda • Discussion of Terms • Advantages of Longitudinal and Continuous Surveys • Problems of Longitudinal and Continuous Surveys • EU National Travel Surveys • Selected Other Surveys

  3. Discussion of terms • Usage (not Definition!) • Uninterruptedobservationofpopulation • Reporting period = oneday • Reporting period > oneday • Periodicallyrepeatedcross-sectionalsurveys • Reports of same individuals at different times • Reports ofsimilar individuals at different times • Continuousreportingperiod > oneday • Interruptedreports by same individuals at different times Term • Continuous survey • Cross-sectional survey • Longitudinal survey • Repeated cross-sections • Panel • Pseudo Panel • Multiday • Multiperiod

  4. Advantages of Longitudinal and Continuous Surveys Important Pros - Survey Organisation and Methodology I • Longer reporting periods (multiday surveys) • smaller sample sizes • reduced unit costs per reported trip • more possibilities for plausibility checks • Panel surveys / multiperiod surveys • Reduced recruitment effort • More possibilities of imputing missing data

  5. Advantages of Longitudinal and Continuous Surveys Important Pros - Survey Organisation and Methodology II • Continuous / annual surveys  operational advantages: time & cost efficiency, reduced learning curve (interviewers etc.) • often established funding • more attractive to survey organisations • Possibility to immediately react on sample biases / selectivity • Continuous survey • Control for season effects

  6. Advantages of Longitudinal and Continuous Surveys Important Pros – Data Analysis I • Longerreportingperiods (multidaysurveys) „2/3 ofobservedvarianceisintrapersonal“ • Analysis ofbehavioralroutines (intrapersonalvariation) • Analysis ofmodeclienteles • Inclusionof rare events (longdistancetravel) • Panel surveys / multiperiodsurveys • Analysis ofbehavioralchanges • Life cycleanalyses

  7. Advantages of Longitudinal and Continuous Surveys Important Pros - Survey Organisation and Methodology II • Continuous / annual surveys  Always up-to-date data • Possibility for pooling data from different years • Continuous survey • Seasonality of mobility behavior

  8. Problems of Longitudinal and Continuous Surveys Important Problems I • In multiday and multiperiod surveys observations are not independent • Larger confidence intervals • (Rolling) panel surveys tend to produce moving means • Multiday and multiperiod surveys lead to higher respondent burden • Higher recruitment effort necessary for quality reports • Danger of selective participation (of those interested in mobility issues) • Danger of selective drop-out

  9. Problems of Longitudinal and Continuous Surveys Important Problems II • In multidaysurveyssomerespondents end theirreportbeforethe end ofthesurveyperiod(fatigue, attrition)

  10. Problems of Longitudinal and Continuous Surveys Important Problems III • In multiperiodsurveyssomerespondentsdrop out beforethe last reportingperiod(attrition, mortality)

  11. EU National Travel Surveys

  12. EU National Travel Surveys – Periodicity of NTS

  13. week 1 week 2 week 3 week 3 EU National Travel Surveys – Multiday NTS • British National Travel Survey • Mobility diary covering 7 days • Short walks only reported on last day mobility diary Collection interview 3 week long distance travel record Placement interview Report of walks <1 mile only on last day

  14. EU National Travel Surveys – Multiperiod NTS • German Mobility Panel MOP: • 7-day 24-h reports • participation in three consecutive years (panel) • annual refreshment of sample

  15. Selected Other Surveys 2005/2006 Swiss panel survey about mobility and car choice behavior 1999-2002 INVERMO long distance travel panel survey 2007/2008 multiday & multiperiod surveys in Frankfurt and Mannheim Regions Since 1990s Parc Auto (France): Panel survey on car ownership Six-week diary surveys: 1999 Karlsruhe / Halle 2003 Thurgau 2005/2006 Madrid-Barcelona Corridor Panel

  16. EU National Travel Surveys *year of most current survey

  17. EU National Travel Surveys *year of most current survey

  18. EU National Travel Surveys *year of most current survey

  19. EU National Travel Surveys *year of most current survey

  20. Characteristics of Selected Surveys Coverage

  21. Characteristics of Selected Surveys Important Survey Elements

  22. Characteristics of Selected Surveys Reporting Period

  23. Characteristics of Selected Surveys Reported Mobility Items

  24. Characteristics of Selected Surveys Micro Data Sets & Sample Sizes

  25. Characteristics of Selected Surveys Data Availability & Usability

  26. Characteristics of Selected Surveys Data Availability & Usability - Language

  27. Characteristics of Selected Surveys Data Availability & Usability - Weights

  28. Mobility Key Figures probably too high realistic level probably too low

  29. Mobility Key Figures

  30. Mobility Key Figures

  31. Mobility Key Figures

  32. Mobility Key Figures

  33. Mobility Key Figures

  34. Mobility Key Figures

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