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4. Time trip took - item G42 5. Main mode of transportation - item G34 6. If public transit was used: access and egress modes used - items G35 through G39 7. Household vehicle used - item G30 8. If household vehicle used: which vehicle - item G31 9. If private vehicle trip: did a household member drive - item G48 10. If household member drove: which household member - item G49 11. If someone else on trip: any household members - item G44 12. If household members on trip: which household members - item G45 13. If someone else on trip: any non-household members - item G46 14. If non-household members on trip: how many - item G47 The answers to this series of core questions about each trip taken by the members of the household on their travel day provide the most sought after and most used data from the NHTS and all other household travel surveys. 2-C.5. TRAVEL PERIOD CORE DATA These data are collected for each long-distance trip that has a farthest destination of at least 50 miles from home that ended during the four-week travel period. 1. Trip purpose - item I13 2. Main means of transportation - item I5 and I15 3. Farthest destination, trip duration and whether the trip was a recurring trip - item H1 4. Who else on trip - items I2 through I4 5. Access and egress modes - items I8 and I11 2-14
6. Overnight stops, transportation mode and stop purpose - items J1 through J3 2-D. SURVEY CONTENT CHANGES IN 2001 The 2001 NHTS saw several changes to both the content and organization of the NHTS questionnaires. As discussed in the previous section, DOT attempted to keep the core questions in the 2001 survey identical to previous surveys. However, some changes were made to improve data quality even to core questions. The key changes in 2001 NHTS compared to the 1995 NPTS survey are described in this section. 2-D.1. THE NPTS AND ATS SURVEYS COMBINED The 2001 NHTS is a combination of the NPTS (daily travel) and the ATS (long-distance travel) surveys. Sampled households were asked to provide both all travel information for an assigned travel day and long trip information for a four-week period ending with the travel day. This combined design was implemented because it could provide a key link between daily travel and long-distance travel behavior by the same survey participants. The 2000 pretest showed that a combined design provided trip and response rates that were comparable to rates obtained when the surveys were conducted separately. In addition, the combined design was more cost-effective and reduced redundancy. 2-D.2. ALL HOUSEHOLD MEMBERS ELIGIBLE In recent NPTS surveys, travel information was only collected from household members five years and older. For the 2001 NHTS, all household members were eligible for a person interview. This change will enable the user to get a more complete picture of household trip making as it rosters trips taken by household members younger than five years that were made with non-household members. 2-15
Page 1 and 2: 2001 NATIONAL HOUSEHOLD TRAVEL SURV
Page 3 and 4: TABLE OF CONTENTS (continued) 2-D.8
Page 5 and 6: TABLE OF CONTENTS (continued) 6-C.
Page 7 and 8: TABLE OF CONTENTS (continued) LIST
Page 9 and 10: USER’S GUIDE This guide includes
Page 11 and 12: These data are collected for: • a
Page 13 and 14: • information on each household v
Page 15 and 16: 1.C.2. WHEN WAS THE SURVEY CONDUCTE
Page 17 and 18: Exhibit 1-1. Changes Over Time in t
Page 19 and 20: The 1969 questionnaire was very sho
Page 21 and 22: In addition to a combined survey, t
Page 23 and 24: CHAPTER 2. SURVEY CONTENT AND INTER
Page 25 and 26: As in the Wisconsin add-on, the adv
Page 27 and 28: Exhibit 2-1. Household Interview Co
Page 29 and 30: • the interviewer was told that t
Page 31 and 32: Exhibit 2-2. Person Interview Conte
Page 33 and 34: Exhibit 2-3. Contents of the Odomet
Page 35: 5. Driver status - items C8, C13 an
Page 39 and 40: include additional questions to det
Page 41 and 42: 2-E. TYPICAL NHTS HOUSEHOLD 2-E.1.
Page 43 and 44: Person Interview - Amy completed he
Page 45 and 46: Person Interview continued with Amy
Page 47 and 48: 2-E.7. TYPICAL NHTS HOUSEHOLD: THAN
Page 49 and 50: 3-A.2. HOW THE DATA WERE COLLECTED
Page 51 and 52: 3-B.2. SAMPLING FRAME Westat’s sa
Page 53 and 54: 3-C.3. INTERVIEWER MONITORING Inter
Page 55 and 56: 3-C.8. ADVANCE LETTER AND CASH INCE
Page 57 and 58: • An eye-catching bright yellow r
Page 59 and 60: • if a travel diary was completed
Page 61 and 62: 3-D.2. UPDATING CATI DURING DATA CO
Page 63 and 64: 3-D.3. APPROACH TO POST INTERVIEW E
Page 65 and 66: thus were recorded on a "Missed Tri
Page 67 and 68: In addition to missed trips reporte
Page 69 and 70: member at all times on the trip. If
Page 71 and 72: Table 3-1. Number of Completed Hous
Page 73 and 74: 8. During the editing process, cert
Page 75 and 76: Exhibit 3-1. Changes in the 2001 NH
Page 77 and 78: CHAPTER 4. SURVEY RESPONSE RATES We
Page 79 and 80: Table 4-1. Weighted Household Respo
Page 81 and 82: Table 4-2. Weighted Person Response
Page 83 and 84: 5-A. HOUSEHOLD WEIGHTS 5-A.1. INITI
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5-C. PERSON TRIP WEIGHTS FOR TRAVEL
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CHAPTER 6. DESCRIPTION OF DATA FILE
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6-B. RELATIONSHIP BETWEEN THE FOUR
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In earlier NHTSs, before “stayed
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Exhibit 6-2. Contents of the 2001 N
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NQR (No match with 1995) Indicates
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6-E. DERIVED VARIABLES Over 239 der
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7-A. TRAVEL CONCEPTS 7-A.1. OVERVIE
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Contact information for user suppor
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7-D.2. WHICH WEIGHT TO USE There ar
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Tables 7-2 and 7-3 provide the vari
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vehicles that would have been obtai
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7-G.2. ID NUMBERS Each unit (e.g. h
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The variables HOUSEID and PERSONID
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NHTS Listing of All Variables By Al
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NHTS Household File Codebook Public
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NHTS Person File Codebook Public Us
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NHTS Vehicle File Codebook Public U
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NHTS Day Trip File Codebook Public
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NHTS Long Trip File Codebook Public
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The SAS System 2001-2002 National H
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APPENDIX D DERIVED VARIABLES This a
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year. Provided by EIA. 14. CDIVMSAR
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31. DRVR_P1 to DRVR_P14*: Indicates
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59. GSCOST: Fuel cost estimated in
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05 Variable HH_RACE5 (C7) is yes (N
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104. IMPTAGE: Subject's age (AGE (C
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16-21 group. 4. If household member
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133. NBIKETRP*: The variable was ob
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calls to the household. Deliver in
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11, 2001. Derived from variable TDA
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201. VEHOWNMO: How long the vehicle
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220. WKSTFIPS: State FIPS Code for
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APPENDIX E ABBREVIATIONS, TRAVEL CO
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egardless of the number of persons
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GLOSSARY HOW TO COMPUTE - The four
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Employed A person is considered emp
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4. Pickup Truck. A pickup truck is
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Passenger For a specific trip, a pa
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or to participate in a sport. 17. R
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Worker See “Employed”. 1. Autom
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Table 1. Full Sample Household Cont
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Table 2. Full Sample Person Control
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Table 3. National Sample Household
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Table 4. National Sample Person Con
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Table 5. Control Totals for Checkin
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APPENDIX G STANDARD TABLES AND LOGI
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Table 1: Number of Households, By F
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Table 3: Number of Persons in House
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Table 4: Number of Drivers, by Annu
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Table 5: Number of Workers, By MSA
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Table 7: Average Number of Travel D
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Table 9: Number of Travel Day Vehic
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Table 12: Average Vehicle Occupancy
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2 = Median Home Value between Q1 an
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Household Size (1, 2, 3, 4 or more)
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H-2. VARIABLES USED TO DEFINE NONRE
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Home Ownership - (Owner/Renter) - H
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• Numbers that are in-scope. Tele
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Survey Research Organizations (CASR
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identical to the person interview c
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Table I-4. Classification of Househ
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useable household person interview
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APPENDIX J METHODS TO ESTIMATE ANNU
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Table J-1. Lag Time between Two Odo
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Table J-2. 2001 NHTS Sample Vehicle
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Table J-3. NHTS Vehicles 1 by Data
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Odometer2 − Odometer1 VMTJuly2001
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these 48 percentages was used as a
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J-5. ESTIMATION METHODS Six differe
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Approach 3. For vehicles with self-
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J-6. SCREENING OF BESTMILE ESTIMATE
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Consistently to the data quality ch
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APPENDIX K ESTIMATION METHODOLOGIES
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The estimation of these statistics
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adequacy of shortfall adjustments h
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MPG(EPA 55/45) denotes the composit
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MPG MPG i(on i(on - road, EPA city)
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household is in the South, otherwis
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m mpg c ij = ij , ∀ j = 1, 2, …
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expenditures, Ei, was estimated by
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January 2004 Version were set to
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Table 3. Number of Vehicles, Vehicl
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Table 4. United States per Vehicle-
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Peugeot 44 H-42 Lada 69 H-56 Porsch
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MAKE: Alfa Romeo (Cont.) (31) (ALFA
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MAKE: Audi (Cont.) (32) (AUDI) Code
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MAKE: Buick (18) (BUIC) Codes AUTOM
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MAKE: Chevrolet (Cont.) (20) (CHEV)
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MAKE: Chevrolet (Cont.) (20) (CHEV)
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MAKE: Chrysler/DaimlerChrysler (Con
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MAKE: Dodge (07) (DODG) Codes Model
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MAKE: Eagle* (10) (EGIL) Codes AUTO
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MAKE: Ford (Cont.) (12) (FORD) Code
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MAKE: Ford (Cont.) (12) (FORD) Code
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MAKE: GMC (Cont.) (23) (GMC ) Codes
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MAKE: Honda (Acura: See “54”) (
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MAKE: Isuzu (Cont.) (38) (ISU ) Cod
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MAKE: Lancia (40) (LINCI) Codes AUT
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MAKE: Lincoln (Cont.) (13) (LINC) C
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MAKE: Mercedes Benz (Cont.) (42) (M
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MAKE: Mercury (Merkur: See “56”
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MAKE: Mitsubishi (Cont.) (52) (MITS
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MAKE: Oldsmobile (Cont.) (21) (OLDS
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MAKE: Plymouth (Cont.) (09) (PLYM)
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MAKE: Pontiac (Cont.) (22) (PONT) C
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MAKE: Saturn (24) (STrN) Codes AUTO
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MAKE: Suzuki (53) (SUZI) Codes MOTO
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MAKE: Triumph (50) (TRIU) Codes AUT
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MAKE: Volvo (51) (VOLVO) Codes AUTO
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MAKE: Other Import (69) Codes AUTOM
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MAKE: BSA (70) (BSA ) Codes Model I
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Codes Model Includes Model Years Bo
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MAKE: Freightliner (Cont.) (82) (FR
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MAKE: International Harvester/ Navi
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MAKE: Iveco/Magirus* (Cont.) (88) (
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MAKE: Gillig (92) Codes Model Inclu
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MAKE: Other Make (Cont.) (98) Codes
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APPENDIX M 2001 NHTS QUESTIONNAIRE
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SECTION B: VEHICLE DATA PROGRAMMER
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PROGRAMMER NOTE: SET SCRN.VEHICNT.
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C3. (C8) Including yourself, how ma
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PROGRAMMER NOTE: DO NOT ALLOW SCRES
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C10. (SC20) Going back to the ages
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IF OTHRPHON = 0, GO TO BOX BEFORE D
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D3. (D4) To whom should we address
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D8. (D6) Travel patterns are affect
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NATIONAL HOUSEHOLD TRAVEL SURVEY Te
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E4. (N_F1A) Last week, did {you/SUB
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SEGMENT WORK E10. (N_F4) Transporta
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E13. (N_F4B) Would you please provi
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E16. (N_F7) How did {you/SUBJECT} u
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E18. (N_F8A) How many people, inclu
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G4. (N_G11A) Let’s continue with
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PROGRAMMER NOTE: VERIFY IF PREVIOUS
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PROGRAMMER NOTE: START TIME FOR FIR
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G19. (N_G20) Did {you/SUBJECT} use
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G22. (MPO3) {What is the name of th
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G25B. (N_G212) [Now I have a few qu
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G26. (N_G22) {Now I have a few ques
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G26E. (N_G217) [Now I have a few qu
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G27E. (N_G217) What was {your/his/h
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G33. (N_G26OV) Which one? (PUBTYPE)
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G35. (N_G27A) How did {you/SUBJECT}
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G38. (N_G28A) How did {you/SUBJECT}
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PROGRAMMER NOTE: IF (G41 (N_G29A))
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G45. (N_G32) Which household member
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PROGRAMMER NOTE: FOR HHM ENTERED IN
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H1. (H2_4) {What was the farthest c
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SECTION I: FARTHEST TRIP DETAIL PRO
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I5. What type of transportation did
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I8. What type of transportation did
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I11. After {you/s(he)} arrived at t
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PROGRAMMER NOTE: ALLOW INTERVIEWERS
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I15. What type of transportation di
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SECTION J: OVERNIGHT STOPS ROSTERIN
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J3. Tell me all the types of transp
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PROGRAMMER NOTE: IF K2 (G2) MRTMTH
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K7. (T2) In what month did {you/SUB
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PROGRAMMER NOTE: IN L2 (N_E1A-D), A
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PROGRAMMER NOTE: IF L5 (N_E2) YEARM
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PROGRAMMER NOTE: IF THE VEHICLE IS
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L11. (N_E8) In the past two months,
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M5. (N_K5D) How long {have you/has
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PROGRAMMER NOTE: RANGE FOR M10 (N_K
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SEGMENT SCRN M13. (K6) In surveys l
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M22. (K15) Does this include income
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M28. (K21) Was {your/his/her} incom
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N3. (ODVERF) [RECORD THE ODOMETER M
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SECTION B: VEHICLE DATA BINTRO El p
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SECTION C: PERSON DATA FOR EACH HOU
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C8. (S7A THROUGH S7H ) Por favor d
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C16. (C5) ¿Cuántos de estos {OTHR
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D5. (D3) Para poder enviarle a uste
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D11. (D9) Le enviaremos a usted {la
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E3 (N_F1) Durante la mayoría de la
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E10. (N_F4) Quienes planean la tran
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E15. (N_F6) La semana pasada, ¿cu
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E17. (N_F8) La semana pasada, ¿{us
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G6. (N_G9A) ¿Anotó {usted/SUBJECT
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G14. (N_G17) ¿En qué fecha hizo {
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G22. (MPO3) {¿Cuál es el nombre d
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G25C. (N_G214) [Ahora tengo unas cu
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G26B. (N_G212) {Ahora tengo unas cu
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G27A. (N_G211) ¿Cuál fue la razó
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G31. (N_G26) ¿Cuál vehículo? (VE
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G35. (N_G27A) ¿De qué manera lleg
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G38. (N_G28A) ¿Cómo llegó {usted
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G44. (N_G31) ¿Había algún miembr
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SEGMENT - TRIP SECTION H: FARTHEST
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SEGMENT - TRIP SECTION I: FARTHEST
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I6. ¿Quién era el chofer? (¿Qui
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I9. ¿Cómo se llamaba el/la {aerop
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I12. Dígame todos los tipos de tra
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I15. ¿Qué tipo de transportación
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SEGMENT - STAY SECTION J: OVERNIGHT
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J3. Dígame todos los tipos de tran
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K4. (G3) ¿Cuál fue la ciudad y es
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SEGMENT GTRV SECTION L: GENERAL TRA
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L3. (N_E9) En la última semana, ¿
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L9. (N_E5) En los últimos 12 meses
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SEGMENT TRAV SECTION M: INTERNET US
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M8. (N_K5F) ¿Nació {usted/SUBJECT
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SEGMENT SCRN M13. (K6) En encuestas
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M23. (K16) ¿El ingreso de quién n
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SEGMENT VEHI SECTION N: COLLECTION
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27. Morpace: Cover letter sent with
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N-4
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N-6
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N-8
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N-10
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NATIONAL HOUSEHOLD TRAVEL SURVEY In
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ENCUESTA NACIONAL DE TRANSPORTE EN
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N-16
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NHTS 2001 Odometer Mileage Form For
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NHTS 2001 Odometer Mileage Form Tha
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ID - 14959963 PHONE: (---) ___ - __
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National Household Travel Survey Re
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16. Who was that? NATIONAL HOUSEHOL
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N-28 National Household Are you con
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Dear Participating Household: Are y
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Dear Kentucky Traveler: Are you con
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OMPO Oahu Metropolitan Planning Org
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NATIONAL HOUSEHOLD TRAVEL SURVEY TR
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ENCUESTA NACIONAL DE TRANSPORTE EN
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Record ALL trips taken on: Please k
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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PHONE NUMBER: (__ __ __) __ __ __ -
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APPENDIX O COMPARABILITY WITH EARLI
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1990 NPTS Research Triangle Institu
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• feasibility of collecting more
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Exhibit O-1. 2000 NHTS Pretest Desi
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APPENDIX P DATA EDITING Section 3-D
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24. Review cases where E1=1 and res
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NTIMES, 3) Calculating the number o
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VARIABLE NAMING SCHEME The variable
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Urban/Rural Continuum - Distributio
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