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NCHRP Report 571: Standardized Procedures for Personal Travel Surveys (2008)
National Cooperative Highway Research Program (NCHRP)

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Pisarski, Alan E, Alsnih, Rahaf, Zmud, Johanna P, Wilmot, Chester G, Brog, Werner, Freedman, Mark, Stopher, Peter R, Pratt, Joanne, Mix, Wende, Lee-Gosselin, Martin, Stecher, Cheryl, Axhausen, Kay W, Transportation Research Board. "2.1.1 I-1: Minimum Question Specification." NCHRP Report 571: Standardized Procedures for Personal Travel Surveys. Washington, DC: The National Academies Press, 2008.

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Page
11
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Page
11
Front Matter (R1-R10)
Summary (1-4)
1.1 Background (5-5)
1.2 Study Objectives (6-6)
1.4 Research Approach (7-8)
1.5 Report Organization (9-9)
Chapter 2 - Summary of Recommended Standardized Procedures and Guidelines (10-10)
2.1.1 I-1: Minimum Question Specification (11-11)
2.1.2 I-2: Categories for Minimum and Other Questions (12-12)
2.2.1 D-1: Number and Type of Contacts (13-16)
2.2.2 D-3: Proxy Reporting (17-17)
2.2.3 D-4: Complete Household Definition (18-18)
2.2.4 D-6: Sample Replacement (19-19)
2.2.6 D-8: Unit Non-Response (20-20)
2.2.7 D-10: Initial Contacts (21-21)
2.2.9 D-14: Respondent Burden (22-22)
2.3.1 P-2: Requirements for Pretests or Pilot Surveys (23-23)
2.4.1 E-2: Ethics (24-25)
2.4.3 E-4: Respondent Questions (26-26)
2.4.5 E-9: Answering Machines and Repeated Call-Back Requests (27-27)
2.4.8 E-12: Time of Day to Begin and End Reporting (28-28)
2.5.1 C-1: Geocoding Standards (29-29)
2.5.3 C-4: Missing Values, Use of Zero, Etc. (30-30)
2.5.4 C-5: Coding Complex Variables (31-34)
2.6.1 A-1: Assessing Sample Bias (35-35)
2.6.3 A-3: Missing Data Imputation (36-36)
2.6.5 A-6: Documentation (37-38)
2.7.1 Q-1: Computing Response Rates (39-39)
2.7.2 Q-2: Transportation Measures of Quality (40-40)
2.7.3 Q-3: Coverage Error (41-41)
2.7.5 Q-6: Validation Statistics (42-42)
2.7.7 Q-8: Number of Missing Values (43-43)
2.7.8 Q-9: Adherence to Quality Standards and Guidelines (44-44)
3.3 National Highway Institute Course (45-45)
3.6 Potential Funding for the Promulgation and Maintenance of the Standardized Procedures and Guidelines (46-47)
4.1.1 D-11: GPS Surveys (48-48)
4.1.3 I-8: SP Data (49-49)
4.2.1 D-2: Who Should Be Surveyed? (50-50)
4.2.2 D-9: Times of Day for Contacts (51-51)
4.2.4 E-7: Cross-Checks in Data Collection and Data Review (52-52)
4.2.5 E-8: Days and Periods to Avoid Data Collection (53-53)
4.2.7 I-4: Ordering of Questions (54-54)
4.2.8 I-6: Instrument Design (55-55)
4.2.9 I-7: Multitasking of Activities (56-56)
4.2.10 S-1: Sample Sizes (57-57)
4.2.12 S-3: Collecting Augment Samples (58-58)
4.2.13 S-4: Stratification Options for Samples (59-59)
4.2.15 S-6: Development of Default Variances (60-60)
4.2.16 P-1: Focus Groups (61-61)
4.2.18 Q-4: Sampling Error (62-62)
4.3.1 Cell Phones (63-63)
4.3.3 Personalized Interview Techniques (64-64)
4.3.5 Impacts of the National Do Not Call Registry (65-65)
4.3.7 Refusal and Non-Contact Conversions (66-66)
4.3.10 Data Archiving in Transportation (67-67)
5.2.1 Scope of Work (68-90)
5.2.2 Schedule of Work (91-92)
Glossary (93-100)
References (101-103)
Abbreviations used without definitions in TRB publications (104-104)

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Summary of Recommended Standardized Procedures and Guidelines 11 Table 1. Summary of items examined in project. Categories Ref Item Type of Recommendation Section Design of Survey I-1 Minimum Question Specification Standardized Procedures 2.1.1 Instruments I-2 Standardization of Categories Standardized Procedures 2.1.2 I-5 Standard Question Wordings Standardized Procedures 2.1.3 Design of Data D-1 Number and Type of Contacts Standardized Procedures 2.2.1 Collection D-3 Proxy Reporting Standardized Procedures 2.2.2 Procedures D-4 Complete Household Definition Standardized Procedures 2.2.3 D-6 Sample Replacement Guidelines 2.2.4 D-7 Item Non-response Standardized Procedures 2.2.5 D-8 Unit Non-response Standardized Procedures 2.2.6 D-10 Initial Contacts More Research 2.2.7 D-13 Incentives Guidelines 2.2.8 D-14 Respondent Burden Standardized Procedures 2.2.9 Pilot Surveys and P-2 Requirements for Pretests or Pilots Standardized Procedures 2.3.1 Pretests and Guidelines P-3 Sample Sizes for Pretests and Pilots Standardized Procedures 2.3.2 Survey E-2 Ethics Standardized Procedures 2.4.1 Implementation E-3 Mailing Materials Standardized Procedures 2.4.2 E-4 Respondent Questions Standardized Procedures 2.4.3 E-5 Caller ID Standardized Procedures 2.4.4 E-9 Answering Machines and Repeated Standardized Procedures 2.4.5 Call-Back Requests E-10 Incorrect Reporting of Non-Mobility Standardized Procedures 2.4.6 E-11 Recording Time of Day Standardized Procedures 2.4.7 E-12 Time of Day to Begin and End Standardized Procedures 2.4.8 Reporting E-13 Creation of Identification Numbers Standardized Procedures 2.4.9 and Guidelines Data Coding C-1 Geocoding Standards Standardized Procedures 2.5.1 Including C-2 Level of Geocoding to be Performed Standardized Procedures 2.5.2 Geocoding C-4 Missing Values, Use of Zero, Etc. Standardized Procedures 2.5.3 C-5 Coding Complex Variables Standardized Procedures 2.5.4 and Guidelines Data Analysis and A-1 Assessing Sample Biases Standardized Procedures 2.6.1 Expansion A-2 Weighting and Expansion of Data Standardized Procedures 2.6.2 A-3 Missing Data Imputation Standardized Procedures 2.6.3 A-4 Data Archiving Standardized Procedures 2.6.4 A-6 Documentation Standardized Procedures 2.6.5 Assessment of Q-1 Computing Response Rates Standardized Procedures 2.7.1 Survey Quality Q-2 Transportation Measures of Quality Standardized Procedures 2.7.2 Q-3 Coverage Error Standardized Procedures 2.7.3 Q-5 Proxy Reporting as a Quality Indicator Standardized Procedures 2.7.4 Q-6 Validation Statistics Standardized Procedures 2.7.5 Q-7 Data Cleaning Statistics Standardized Procedures 2.7.6 Q-8 Number of Missing Values Standardized Procedures 2.7.7 Q-9 Adherence to Quality Guidelines Standardized Procedures 2.7.8 In making these recommendations, it is also hoped that those who are less well-informed will find this to be a useful way to define how a survey might be done that would meet current expec- tations of quality, accuracy, and comparability. To this end, also, an RFP template has been developed that incorporates the majority of the suggested standardized procedures. To be con- sistent with normal RFP language, the narrative is written in prescriptive language. This should not be misinterpreted by the casual reader as implying establishment of standards; rather, it is simply a way of presenting an RFP in its normal form. 2.1 Design of Survey Instruments 2.1.1 I-1: Minimum Question Specification This item addresses the issue of the minimum question content of a household or personal travel survey. It covers what is considered to be essential information about the demographics