| Field Name | Description |
|---|
| Houseid | Household identification number | |
| Vehicleid | HH vehicle number | |
| Annualzd | Odometer based annualized vmt | |
| AnnFlg | Reasons for missing ANNUALZD | |
| AnnEdit | Flag any edits/adjustments to ANNUALZD | |
| AnnOut | Flag identifying ANNUALZD outlier alues | |
| CensusDivision | Census division | |
| CensusR | Census region | |
| Msasize | Size of MSA of household | |
| Annmiles | Self-Reported annualized vmt | |
| Hhvehcnt | No. of vehicles in household (derived) | |
| Maindrvr | Does one HH mem. usually drive this veh | |
| Makecode | First 2 char of NASS code | |
| Milelimt | =1 if annmiles capped at 115K | |
| Modlcode | Last 3 char of NASS code | |
| Purchmon | Month of purchase | |
| Vehicle12mnt | Vehicle received in last 12 mo | |
| Vehiclemiles | Reported mileage for last 12 mo | |
| Vehiclenew | Purchased new (=1) or used (=2) | |
| Vehicletype | Vehicle type | |
| Vehicleyear | Model year of veh (yyyy) | |
| Whomain | Who drives veh most of time | |
| Purchyr | Year vehicle was purchas (yyyy) | |
| Varstrat | Sample stratum | |
| Drvrcnt | Number of drivers in HH | |
| Hhelgcnt | Number of eligible persons 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) | |
| Wrkcount | No. of workers in HH | |
| Wthhfin | Final household weight | |
| Hhcmsa | CMSA identification code | |
| OdDay1 | Date of first odometer reading - day | |
| OdMon1 | Date of first odometer reading - month | |
| OdYr1 | Date of first odometer reading - year | |
| OdDay2 | Date of second odometer reading - day | |
| OdMon2 | Date of second odomete reading - month | |
| OdYr2 | Date of second odomete reading - year | |
| OdRead1 | First odometer reading | |
| OdRead2 | Second odometer reading | |
| 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 | |
| Anulzdse | Standard error of ANNUALZD estimate | |
| Year | Year | |
| HhcmsaNm | HH_CMSA description | |
| MstrMon | Date of master interview - month | |
