NHTS / NPTS Documentation
2009 NHTS Documentation
User's Guide
- Codebook and Data Dictionary
- Introduction, survey design, response rates, weighting, data files, and using the data
- Weighting report
- Derived and added variables including Claritas, EIA, BESTMILE, GASPRICE, and FARS
- Glossary: abbreviations, travel concepts and glossary of terms
- Questionnaire and field documents
Documentation for Previous Surveys
These comprehensive User's Guides include the Codebook.
User's Guides
- 2001
- 1995
- 1990
- 1983 — see the 1983 NPTS home page
- 1977 — see the 1977 NPTS home page
- 1969 — see the 1969 NPTS home page