NHTS
FHWA

Codebook Browser

Survey:
Dataset:
Codebook Variable Description Household File Person File Vehicle File Daytrip File Question Type Size
Codebook ALT_16 Alternative Mode of Transportation: Public Transportation or Taxi Y ORNL C 2
Codebook ALT_23 Alternative Mode of Transportation: Passenger to Friend/Family Member or Rental Car Y ORNL C 2
Codebook ALT_45 Alternative Mode of Transportation: Bicycle or Walk Y ORNL C 2
Codebook ANNMILES Self-reported annualized mile estimate Y ORNL N 6
Codebook BESTMILE Best estimate of annual miles Y ORNL N 8
Codebook BEST_EDT Flag any edits/adjustments to BESTMILE Y ORNL C 2
Codebook BEST_FLG How BESTMILE was computed Y ORNL C 2
Codebook BEST_OUT Flag identifying BESTMILE outlier values Y ORNL C 2
Codebook BIKE Frequency of Bicycle Use for Travel Y ORNL C 2
Codebook BIKE2SAVE Bicycle to Reduce Financial Burden of Travel Y ORNL C 2
Codebook BIKE4EX Count of Bike Trips for Exercise Y ORNL N 3
Codebook BIKESHARE Count of Bike Share Program Usage Y ORNL N 3
Codebook BIKE_DFR Reason for Not Biking More: Infrastructure Y ORNL C 2
Codebook BIKE_GKP Reason for Not Biking More: Safety Y ORNL C 2
Codebook BORNINUS Respondent was born in U.S. Y ORNL C 2
Codebook BUS Frequency of Bus Use for Travel Y ORNL C 2
Codebook CAR Frequency of Personal Vehicle Use for Travel Y ORNL C 2
Codebook CARRODE Count of People in Vehicle to Work Y ORNL N 3
Codebook CARSHARE Count of Car Share Program Usage Y ORNL N 3
Codebook CDIVMSAR Grouping of household by combination of census division, MSA status, and presence of a subway system when population greater than 1 million Y Y Y Y ORNL C 2
Codebook CENSUS_D 2010 Census division classification for the respondent's home address Y Y Y Y ORNL C 2
Codebook CENSUS_R Census region classification for home address Y Y Y Y ORNL C 2
Codebook CNTTDHH Count of household trips on travel day Y ORNL N 3
Codebook CNTTDTR Count of person trips on travel day Y ORNL N 3
Codebook CONDNIGH Medical Condition Results in Limiting Driving to Daytime Y ORNL C 2
Codebook CONDPUB Medical Condition Results in Using Bus or Subway Less Frequently Y ORNL C 2
Codebook CONDRIDE Medical Condition Results in Asking Others for Rides Y ORNL C 2
Codebook CONDRIVE Medical Condition Results in Giving up Driving Y ORNL C 2
Codebook CONDSPEC Medical Condition Results in Using Special Transportation Services Y ORNL C 2
Codebook CONDTAX Medical Condition Results in Using a Reduced Fare Taxi Y ORNL C 2
Codebook CONDTRAV Medical Condition Results in Reduced Day-to-Day Travel Y ORNL C 2
Codebook DELIVER Count of Times Purchased Online for Delivery in Last 30 Days Y ORNL N 3
Codebook DIARY Travel Diary completion status Y ORNL C 2
Codebook DISTTOSC17 Road network distance, in miles, between respondent's home location and school location Y ORNL N 7
Codebook DISTTOWK17 Road network distance, in miles, between respondent's home location and work location Y ORNL N 7
Codebook DRIVER Driver status, derived Y Y ORNL C 2
Codebook DROP_PRK Parked or Dropped Off at Station Y ORNL C 2
Codebook DRVRCNT Number of drivers in household Y Y Y Y ORNL N 3
Codebook DRVR_FLG Respondent drove on trip Y ORNL C 2
Codebook DWELTIME Time at destination Y ORNL N 4
Codebook EDUC Educational Attainment Y Y ORNL C 2
Codebook ENDTIME Trip End Time (HHMM) Y ORNL C 4
Codebook FLEXTIME Flex Time Y ORNL C 2
Codebook FRSTHM17 Travel day began at home location Y ORNL C 2
Codebook FUELTYPE Fuel Type Y ORNL C 2
Codebook GASPRICE Price of gasoline, in cents, on respondent's travel day Y ORNL C 5
Codebook GCDWORK Great circle distance (miles) between home and work Y ORNL N 7
Codebook GT1JBLWK Have more than one job Y ORNL C 2
Codebook HBHTNRNT Category of the percent of renter-occupied housing in the census block group of the household's home location Y Y Y Y ORNL C 2
Codebook HBHUR Urban / Rural indicator - Block group Y Y Y Y ORNL C 2
Codebook HBPPOPDN Category of population density (persons per square mile) in the census block group of the household's home location Y Y Y Y ORNL C 5
Codebook HBRESDN Category of housing units per square mile in the census block group of the household's home location Y Y Y Y ORNL C 5
Codebook HEALTH Opinion of Health Y ORNL C 2
Codebook HFUEL Type of Hybrid Vehicle Y ORNL C 2
Codebook HHFAMINC Household income Y Y Y Y ORNL C 2
Codebook HHMEMDRV Household member drove on trip Y ORNL C 2
Codebook HHRELATD At least two household persons are related Y ORNL C 2
Codebook HHRESP Person identifier of household respondent Y Y Y ORNL C 2
Codebook HHSIZE Count of household members Y Y Y Y ORNL N 3
Codebook HHSTATE Household state Y Y Y Y ORNL C 2
Codebook HHSTFIPS State FIPS for household address Y Y Y Y ORNL C 2
Codebook HHVEHCNT Count of Household vehicles Y Y Y Y ORNL N 3
Codebook HH_CBSA Core Based Statistical Area (CBSA) FIPS code for the respondent's home address Y Y Y Y ORNL C 5
Codebook HH_HISP Hispanic status of household respondent Y Y Y Y ORNL C 2
Codebook HH_ONTD Number of household members on trip including respondent Y ORNL N 3
Codebook HH_RACE Race of household respondent Y Y Y Y ORNL C 2
Codebook HOMEOWN Home Ownership Y Y Y Y ORNL C 2
Codebook HOUSEID Household Identifier Y Y Y Y ORNL C 8
Codebook HTEEMPDN Category of workers per square mile in the census tract of the household's home location Y Y Y Y ORNL C 4
Codebook HTHTNRNT Category of the percent of renter-occupied housing in the census tract of the household's home location Y Y Y Y ORNL C 2
Codebook HTPPOPDN Category of population density (persons per square mile) in the census tract of the household's home location Y Y Y Y ORNL C 5
Codebook HTRESDN Category of housing units per square mile in the census tract of the household's home location Y Y Y Y ORNL C 5
Codebook HYBRID Hybrid vehicle Y ORNL C 2
Codebook LIF_CYC Life Cycle classification for the household, derived by attributes pertaining to age, relationship, and work status Y Y Y Y ORNL C 2
Codebook LOOP_TRIP Trip origin and destination at identical location Y ORNL C 2
Codebook LPACT Count of Times of Light or Moderate Physical Activity in Past Week Y ORNL N 3
Codebook LSTTRDAY17 Last trip before travel day Y ORNL C 2
Codebook MAKE Vehicle Make Y ORNL C 3
Codebook MCUSED Count of Motorcycle or Moped Trips Y ORNL N 3
Codebook MEDCOND Medical Condition Y ORNL C 2
Codebook MEDCOND6 Medical Condition, How Long Y ORNL C 2
Codebook MODEL Vehicle Model Y ORNL C 5
Codebook MSACAT Metropolitan Statistical Area (MSA) category for the household's home address Y Y Y Y ORNL C 2
Codebook MSASIZE Population size category of the Metropolitan Statistical Area (MSA) Y Y Y Y ORNL C 2
Codebook NBIKETRP Count of Bike Trips Y ORNL N 3
Codebook NOCONG Trip Time in Minutes to Work without Traffic Y ORNL N 3
Codebook NONHHCNT Number of non-household members on trip Y ORNL N 3
Codebook NUMADLT Count of adult household members at least 18 years old Y Y Y Y ORNL N 3
Codebook NUMONTRP Number of people on trip including respondent Y ORNL N 3
Codebook NUMTRANS Count of Transfers Y ORNL N 3
Codebook NWALKTRP Count of Walk Trips Y ORNL N 3
Codebook OCCAT Job category Y ORNL C 2
Codebook OD_READ Odometer Reading Y ORNL N 6
Codebook ONTD_P1 Household Person Identifier on Trip: 1 Y ORNL C 2
Codebook ONTD_P10 Household Person Identifier on Trip: 10 Y ORNL C 2
Codebook ONTD_P11 Household Person Identifier on Trip: 11 Y ORNL C 2
Codebook ONTD_P12 Household Person Identifier on Trip: 12 Y ORNL C 2
Codebook ONTD_P13 Household Person Identifier on Trip: 13 Y ORNL C 2
Codebook ONTD_P2 Household Person Identifier on Trip: 2 Y ORNL C 2
Codebook ONTD_P3 Household Person Identifier on Trip: 3 Y ORNL C 2
Codebook ONTD_P4 Household Person Identifier on Trip: 4 Y ORNL C 2
Codebook ONTD_P5 Household Person Identifier on Trip: 5 Y ORNL C 2
Codebook ONTD_P6 Household Person Identifier on Trip: 6 Y ORNL C 2
Codebook ONTD_P7 Household Person Identifier on Trip: 7 Y ORNL C 2
Codebook ONTD_P8 Household Person Identifier on Trip: 8 Y ORNL C 2
Codebook ONTD_P9 Household Person Identifier on Trip: 9 Y ORNL C 2
Codebook OUTCNTRY Respondent was out of the country on travel day Y ORNL C 2
Codebook OUTOFTWN Away from home for entire travel day Y ORNL C 2
Codebook PARA Frequency of Paratransit Use for Travel Y ORNL C 2
Codebook PAYPROF Work for Pay in Previous Week Y ORNL C 2
Codebook PC Frequency of Desktop or Laptop Computer Use to Access the Internet Y ORNL C 2
Codebook PERSONID Person Identifier Y Y Y ORNL C 2
Codebook PHYACT Level of Physical Activity Y ORNL C 2
Codebook PLACE Travel is a Financial Burden Y ORNL C 2
Codebook PRICE Price of Gasoline Affects Travel Y ORNL C 2
Codebook PRMACT Primary Activity in Previous Week Y Y ORNL C 2
Codebook PROXY Trip info from respondent or proxy Y Y ORNL C 2
Codebook PSGR_FLG Respondent was passenger on trip Y ORNL C 2
Codebook PTRANS Public Transportation to Reduce Financial Burden of Travel Y ORNL C 2
Codebook PTUSED Count of Public Transit Usage Y ORNL N 3
Codebook PUBTIME Minutes Spent Transferring to Work Y ORNL N 3
Codebook PUBTRANS Public transportation used on trip Y ORNL C 2
Codebook RAIL MSA heavy rail status for household Y Y Y Y ORNL C 2
Codebook RESP_CNT Count of responding persons per household Y ORNL N 3
Codebook RIDESHARE Count of Rideshare App Usage Y ORNL N 3
Codebook R_AGE Respondent Age Y Y ORNL N 3
Codebook R_AGE_IMP Age (imputed) Y Y ORNL N 3
Codebook R_HISP Hispanic or Latino Origin Y ORNL C 2
Codebook R_RACE Respondent Race Y ORNL C 2
Codebook R_RELAT Relationship Y ORNL C 2
Codebook R_SEX Gender Y Y ORNL C 2
Codebook R_SEX_IMP Gender (imputed) Y Y ORNL C 2
Codebook SAMEPLC Reason for No Trips Y ORNL C 2
Codebook SAMPSTRAT Primary Sampling Stratum Assignment Y ORNL C 2
Codebook SCHTRN1 Mode to school Y ORNL C 2
Codebook SCHTRN2 Mode from school Y ORNL C 2
Codebook SCHTYP Student Status Y ORNL C 2
Codebook SCRESP Person identifier of mail screener respondent, always 1 to roster self first Y ORNL C 2
Codebook SMPLSRCE Sample where the case originated Y Y Y Y ORNL C 2
Codebook SPHONE Frequency of Smartphone Use to Access the Internet Y ORNL C 2
Codebook STRTTIME Trip Start Time (HHMM) Y ORNL C 4
Codebook TAB Frequency of Tablet Use to Access the Internet Y ORNL C 2
Codebook TAXI Frequency of Taxi Service or Rideshare Use for Travel Y ORNL C 2
Codebook TDAYDATE Date of travel day (YYYYMM) Y Y Y Y ORNL C 6
Codebook TDCASEID Unique identifier for every trip record in the file Y ORNL C 12
Codebook TDTRPNUM Incrementing travel day trip number, starting at 1 for each person in the file Y ORNL C 2
Codebook TDWKND Weekend trip Y ORNL C 2
Codebook TIMETOWK Trip Time to Work in Minutes Y ORNL N 3
Codebook TRACCTM Trip Time to Transit Station in Minutes Y ORNL N 3
Codebook TRACC_BUS Bus as mode used to get to public transit? Y ORNL C 2
Codebook TRACC_CRL Rail as mode used to get to public transit? Y ORNL C 2
Codebook TRACC_OTH Other mode used to get to public transit? Y ORNL C 2
Codebook TRACC_POV POV as mode used to get to public transit? Y ORNL C 2
Codebook TRACC_SUB Subway as mode used to get to public transit? Y ORNL C 2
Codebook TRACC_WLK Walk as mode used to get to public transit? Y ORNL C 2
Codebook TRAIN Frequency of Train Use for Travel Y ORNL C 2
Codebook TRAVDAY Travel day - day of week Y Y Y Y ORNL C 2
Codebook TREGRTM Time to Destination from Transit in Minutes Y ORNL N 3
Codebook TREGR_BUS Bus as mode used to get from public transit? Y ORNL C 2
Codebook TREGR_CRL Rail as mode used to get from public transit? Y ORNL C 2
Codebook TREGR_OTH Other mode used to get from public transit? Y ORNL C 2
Codebook TREGR_POV POV as mode used to get from public transit? Y ORNL C 2
Codebook TREGR_SUB Subway as mode used to get from public transit? Y ORNL C 2
Codebook TREGR_WLK Walk as mode used to get from public transit? Y ORNL C 2
Codebook TRIPPURP Generalized purpose of trip, home-based and non-home based Y ORNL C 8
Codebook TRPACCMP Count of People on Trip Y ORNL N 3
Codebook TRPHHACC Count of Household Members on Trip Y ORNL N 3
Codebook TRPHHVEH Household Vehicle Used on Trip Y ORNL C 2
Codebook TRPMILES Trip distance in miles, derived from route geometry returned by Google Maps API, or from reported loop-trip distance Y ORNL N 8
Codebook TRPTRANS Trip Mode, derived Y ORNL C 2
Codebook TRVLCMIN Trip Duration in Minutes Y ORNL N 4
Codebook TRWAITTM Transit wait time in minutes Y ORNL N 3
Codebook URBAN Household's urban area classification, based on home address and 2014 TIGER/Line Shapefile Y Y Y Y ORNL C 2
Codebook URBANSIZE Urban area size where home address is located Y Y Y Y ORNL C 2
Codebook URBRUR Household in urban/rural area Y Y Y Y ORNL C 2
Codebook USEPUBTR Public Transit Usage on Travel Date, derived Y ORNL C 2
Codebook VEHAGE Age of vehicle, based on model year Y ORNL N 3
Codebook VEHID Vehicle Identifier Y Y ORNL C 2
Codebook VEHOWNED Owned Vehicle Longer than a Year Y ORNL C 2
Codebook VEHOWNMO Months of Vehicle Ownership Y ORNL C 2
Codebook VEHTYPE Vehicle Type Y ORNL C 2
Codebook VEHYEAR Vehicle Year Y ORNL N 4
Codebook VMT_MILE Trip distance in miles for personally driven vehicle trips, derived from route geometry returned by Google Maps API Y ORNL N 8
Codebook VPACT Count of Times of Vigorous Physical Activity in Past Week Y ORNL N 3
Codebook WALK Frequency of Walking for Travel Y ORNL C 2
Codebook WALK2SAVE Walk to Reduce Financial Burden of Travel Y ORNL C 2
Codebook WALK4EX Count of Walk Trips for Exercise Y ORNL N 3
Codebook WALK_DEF Reason for Not Walking More: Infrastructure Y ORNL C 2
Codebook WALK_GKQ Reason for Not Walking More: Safety Y ORNL C 2
Codebook WEBUSE17 Frequency of internet use Y ORNL C 2
Codebook WHODROVE Person Identifier Who Drove on Trip Y ORNL C 2
Codebook WHOMAIN Vehicle Main Driver Y ORNL C 2
Codebook WHOPROXY Household Person Identifier Responsible for Trip Reporting Y ORNL C 2
Codebook WHYFROM Trip Origin Purpose Y ORNL C 2
Codebook WHYTO Trip Destination Purpose Y ORNL C 2
Codebook WHYTRP1S Trip purpose summar Y ORNL C 2
Codebook WHYTRP90 Travel day trip purpose consistent with 1990 NPTS design Y ORNL C 2
Codebook WKFMHMXX Count of Days Worked From Home in Last Month Y ORNL N 3
Codebook WKFTPT Full-Time or Part-Time Worker Y ORNL C 2
Codebook WKRMHM Option of Working from Home Y ORNL C 2
Codebook WKSTFIPS The state FIPS code for the respondent's geocoded work address. The state FIPS codes were identified using United States Census Bureau 2016 TIGER/Line Shapefiles. Y ORNL C 2
Codebook WORKER Worker status Y Y ORNL C 2
Codebook WRKCOUNT Number of workers in household Y Y Y Y ORNL N 3
Codebook WRKTIME Arrival Time at Work Y ORNL C 8
Codebook WRKTRANS Mode to Work Y ORNL C 2
Codebook WRK_HOME Work from Home Y ORNL C 2
Codebook WTHHFIN Final HH weight Y Y ORNL N 8
Codebook WTPERFIN Final Person weight Y ORNL N 8
Codebook WTTRDFIN Final trip weight Y ORNL N 8
Codebook W_CANE Medical Device Used: Cane Y ORNL C 2
Codebook W_CHAIR Medical Device Used: Wheelchair Y ORNL C 2
Codebook W_CRUTCH Medical Device Used: Crutches Y ORNL C 2
Codebook W_DOG Medical Device Used: Dog Assistance Y ORNL C 2
Codebook W_MTRCHR Medical Device Used: Motorized Wheelchair Y ORNL C 2
Codebook W_NONE Medical Device Used: None Y ORNL C 2
Codebook W_SCOOTR Medical Device Used: Motorized Scooter Y ORNL C 2
Codebook W_WHCANE Medical Device Used: White Cane Y ORNL C 2
Codebook W_WLKR Medical Device Used: Walker Y ORNL C 2
Codebook YEARMILE Miles Personally Driven in all Vehicles Y ORNL N 6
Codebook YOUNGCHILD Count of persons with an age between 0 and 4 in household Y ORNL N 3
Codebook YRTOUS Year of Arrival in United State Y ORNL N 4
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