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National Household Travel SurveyPre- and Post-9/11 Data Documentation

National Household Travel Survey Pre- and Post-9/11 Data Documentation

National Household Travel Survey
Pre- and Post-9/11 Data Documentation


Table of Contents File Formats
Entire Report
Chapter 1. The NHTS and 9/11
Pre- and Post-9/11 Data Files
NHTS 2001--Overview
Chapter 2. Weight Construction
Initial Pre-9/11 and Post-9/11 Person Data Sets
Person-level Weight
ReweightingQuestions and Answers
Adjustment for Data Splitting
Raking
Trimming
Long-distance Trip Data Sets
Long-distance Trip Weights
Chapter 3. Replicate Weight Construction
Person-level Replicates
Replicate Construction
Adjustment for Delete-One Jackknife Method
Raking
Long-distance Trip Replicates
Chapter 4. Description of Data Files
Structure of 2001 NHTS Pre-9/11 and Post-9/11 Data Files
Derived Data Sets
Data Dictionary
Table 1. Structure of 2001 NHTS Pre-9/11 and Post-9/11 Data Files
Table 2. Derived Data Sets
Chapter 5. Using the Data
Travel Concepts
Weighting the Data
Evaluating the Impact of 9/11 on Long-Distance Trip Travel Pattern
Calculating the Standard Error
Data File Conventions
Appendix A: Codebook
Appendix B: Data Dictionary
Pre-9/11 Long
Pre-9/11 Person
Post-9/11 Long
Post-9/11 Person
Appendix C: Public Use Data Files
Appendix D: Control Totals and Adjustment Factors
Table 1. Person Control Totals and Adjustment Factors Used in Weighting of Pre-9/11 NHTS Data
Table 2. Person Control Totals and Adjustment Factors Used in Weighting of Post-9/11 NHTS Data
Appendix E: Abbreviations, Travel Concepts, and Glossary of Terms