DOT HS 812 958 June 2020 Crash Investigation Sampling System 2018 Analytical User’s Manual DISCLAIMER This publication is distributed by the U.S. Department of Transportation, National Highway Traffic Safety Administration, in the interest of information exchange. The opinions, findings, and conclusions expressed in this publication are those of the authors and not necessarily those of the Department of Transportation or the National Highway Traffic Safety Administration. The United States Government assumes no liability for its content or use thereof. If trade or manufacturers’ names or products are mentioned, it is because they are considered essential to the object of the publication and should not be construed as an endorsement. The United States Government does not endorse products or manufacturers. Suggested APA Format Citation: Radja, G. A., Noh, E.-Y., & Zhang, F. (2020, June). Crash Investigation Sampling System 2018 analytical user’s manual (Report No. DOT HS 812 958). National Highway Traffic Safety Administration. Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient’s Catalog No. DOT HS 812 958 4. Title and Subtitle 5. Report Date Crash Investigation Sampling System June 2020 2018 Analytical User’s Manual 6. Performing Organization Code NSA-100 7. Authors 8. Performing Organization Report No. Gregory A. Radja, Safety Systems Management Division Eun-Young Noh, Fan Zhang, Mathematical Analysis Division 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Office of Data Acquisition National Center for Statistics and Analysis 11. Contract or Grant No. National Highway Traffic Safety Administration 1200 New Jersey Avenue SE Washington, DC 20590 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered National Highway Traffic Safety Administration . 1200 New Jersey Avenue SE 14. Sponsoring Agency Code Washington, DC 20590 15. Supplementary Notes 16. Abstract The Crash Investigation Sampling System (CISS) provides a comprehensive national traffic crash database. Data collection is accomplished at 32 geographical sites, called Primary Sampling Units. This data is weighted to represent all police-reported motor vehicle crashes occurring in the United States during the year involving passenger cars, light trucks, and light vans that were towed. This manual and the NHTSA Field Crash Investigation 2018 Coding and Editing Manual are part of the primary documentation supporting the 2018 CISS data file. 17. Key Words 18. Distribution Statement CISS, data elements, data attributes, analytical user’s manual Document is available to the public from the National Technical Information Service, www.ntis.gov. 19 Security Classif. (of this report) 20. Security Classif. (of this page) 21 No. of Pages 22. Price Unclassified Unclassified 469 Form DOT F 1700.7 (8-72) Reproduction of completed page authorized CISS Analytical User’s Manual Page i Table of Contents SECTION 1 ...................................................................................................................... 1 INTRODUCTION ......................................................................................................... 1 SECTION 2 ...................................................................................................................... 3 MAJOR CHANGES FROM CDS TO CISS .................................................................. 3 SECTION 3 ...................................................................................................................... 5 CISS SAMPLE DESIGN, WEIGHTING, AND ESTIMATION ....................................... 5 SECTION 4 .................................................................................................................... 11 SAS FILE CHANGES IN 2018 ................................................................................... 11 SECTION 5 .................................................................................................................... 14 DATA ELEMENTS, DEFINITIONS, and CODES ...................................................... 14 Common Data Elements ............................................................................................ 14 CASE IDENTIFIER ................................................................................................. 14 PSU ........................................................................................................................ 14 SEQUENTIAL CASE NUMBER ............................................................................. 14 CASE NUMBER ..................................................................................................... 14 CATEGORY ........................................................................................................... 15 VEHICLE NUMBER ............................................................................................... 15 VERSION NUMBER ............................................................................................... 15 CASE WEIGHT ...................................................................................................... 15 PSU STRATA ......................................................................................................... 15 The CRASH Data Files .............................................................................................. 16 CRASH Dataset ..................................................................................................... 16 EVENT Dataset ...................................................................................................... 22 JKWGT Dataset ..................................................................................................... 28 JKCOEFF Dataset ................................................................................................. 31 The GENERAL VEHICLE Data Files ......................................................................... 32 GV Dataset ............................................................................................................ 32 DISTRACT Dataset ................................................................................................ 74 PRE_FHE Dataset ................................................................................................. 76 VEHSPEC Dataset ................................................................................................. 77 VINDERIVED Dataset ............................................................................................ 82 CISS Analytical User’s Manual Page ii The EXTERIOR VEHICLE Data Files ........................................................................ 86 CDC Dataset .......................................................................................................... 86 TIREPLAC Dataset .............................................................................................. 103 TIRE Dataset ....................................................................................................... 107 TIREDAMAGE Dataset ........................................................................................ 115 AVOID Dataset ..................................................................................................... 116 FUEL Dataset....................................................................................................... 118 FIRE Dataset ....................................................................................................... 122 EDRCOLLECT Dataset ........................................................................................ 124 EDRSUMM Dataset ............................................................................................. 126 EDREVENT Dataset ............................................................................................ 128 EDRREST Dataset ............................................................................................... 133 EDRPRECRASH Dataset .................................................................................... 144 EDRPOSTCRASH Dataset .................................................................................. 147 VEHMEAS Dataset .............................................................................................. 149 The INTERIOR VEHICLE Data Files ....................................................................... 158 ADAPT Dataset .................................................................................................... 158 GLAZING Dataset ................................................................................................ 160 INTEGRITY Dataset ............................................................................................. 163 INTERIOR Dataset ............................................................................................... 164 INTRUSION Dataset ............................................................................................ 173 OCCONTACT Dataset ......................................................................................... 178 The PERSON Data Files ......................................................................................... 185 OCC Dataset ........................................................................................................ 185 SEAT Dataset ...................................................................................................... 215 SEATXBAG Dataset ...........................................................................................