| Field Name | Description |
|---|
| Proxy | Proxy respondent for person data | |
| RAge | Age of sample person | |
| RSex | Sex of sample person | |
| Driver | Person is a driver D9 | |
| CensusD | Census division | |
| CensusRegion | Census region | |
| Worker | Respondent is a worker | |
| Hhvehcnt | No. of vehicles in household (derived) | |
| Msasize | Size of MSA of household | |
| Tripnum | Persons travel period trip number | |
| Varstrat | Sample stratum | |
| Houseid | Household identification number | |
| Drvrcnt | Number of drivers in HH | |
| Hhfaminc | HH family income category | |
| Hhsize | Total number of persons in HH | |
| HhHisp | Hispanic status of ref. person | |
| HhRace | Race of reference person | |
| LifeCycle | Family life cycle | |
| Hhmsa | MSA identification code | |
| MstrYr | Date of master interview - year | |
| Rail | Presence/absence of rail | |
| SumStat | Summary status code for household | |
| TravelDayMonth | Travel day date (MM) | |
| TravelDayYear | Travel day date (YY) | |
| TperBmo | Travel period beginning date (MM) | |
| TperByr | Travel period beginning date (YY) | |
| TperEmo | Travel period ending date (MM) | |
| TperEyr | Travel period ending date (YY) | |
| Towhypas | Trip purpose for passenger | |
| Wrkcount | No. of workers in HH | |
| Hhcmsa | CMSA identification code | |
| Country | Destination country code | |
| Deststat | Destination state | |
| Hhtrpid | Trip number for household travel period | |
| Personid | Person ID number | |
| RetMon | Return month of travel period trip | |
| RetYr | Return year of travel period trip | |
| Towhytrp | Trip purpose travel period trip | |
| ToTrans | Main transpiration means - period trip | |
| Wttrpfin | Final travel period trip weight | |
| Calcdist | Calc distance home to destination | |
| DrvrTpt | Person was the main driver on trip | |
| Substrat | Substratum within VARSTRAT | |
| Hbppopdn | Population density, block group | |
| Hbhur | Urban/rural code, block group | |
| Hbhresdn | HU density (units/square mile), BG | |
| Hbhinmed | Median household income, BG | |
| Year | Year | |
| HhcmsaNm | HH_CMSA description | |
| MstrMon | Date of master interview - month | |
