Title page
Contents
Introduction 11
Crash Data Quality Control 13
Quality Control Analyses 14
Comparisons to Baseline 14
Weather Condition Example 14
Cargo Body Type Example 17
Examples Without a Baseline Comparison 18
Data Quality Performance Measures 18
Timeliness 20
Accuracy 22
Completeness 22
Uniformity 24
Integration 24
Accessibility 24
Crash Data Edit Checks 25
Crash Section 25
C1. Crash Identifier 25
C2. Crash Classification 25
C3. Crash Date and Time 26
C4. Crash County 26
C5. Crash City/Place (Political Jurisdiction) 26
C6. Crash Location 26
C7. First Harmful Event 27
C8. Location of First Harmful Event Relative to the Trafficway 27
C9. Manner of Crash/Collision Impact 28
C10. Source of Information 28
C11. Weather Conditions 28
C12. Light Condition 29
C13. Roadway Surface Condition 29
C14. Contributing Circumstances - Roadway Environment 29
C15. Relation to Junction 30
C16. Type of Intersection 30
C19. Crash Severity 31
C20. Number of Motor Vehicles Involved 31
C21. Number of Motorists 31
C22. Number of Nonmotorists 31
C23. Number of Non-Fatally Injured Persons 31
C24. Number of Fatalities 32
C25. Alcohol Involvement 32
C26. Drug Involvement 32
C27. Day of Week 32
Crash Description (text field) 32
Crash Diagram (graphic) 32
Vehicle Section 33
V2. Motor Vehicle Unit Type and Number 33
V3. Motor Vehicle Registration State and Year 33
V5. Motor Vehicle Make 33
V6. Motor Vehicle Model Year (YYYY) 34
V7. Motor Vehicle Model 34
V8. Motor Vehicle Body Type Category 34
V9. Total Occupants in Motor Vehicle 35
V18. Motor Vehicle Maneuver/Action 35
V20. Sequence of Events 35
V21. Most Harmful Event for This Motor Vehicle 36
V22. Hit-and-Run 36
V23. Towed Due to Disabling Damage 36
V24. Contributing Circumstances, Motor Vehicle 36
Person Section 37
P1. Name of Person Involved 37
P2. Date of Birth 37
P3. Sex 37
P4. Person Type 37
P5. Injury Status 37
P6. Occupant's Motor Vehicle Unit Number 38
P11. Driver License Jurisdiction 38
P12. Driver License Number, Class, CDL, and Endorsements 38
P13. Speeding-Related 38
P14. Driver Actions at Time of Crash 38
P16. Driver License Restrictions 39
P17. Driver License Status 39
P18. Distracted By 39
P19. Condition at Time of the Crash 40
P20. Law Enforcement Suspects Alcohol Use 40
P21. Alcohol Test 40
P22. Law Enforcement Suspects Drug Use 40
P23. Drug Test 41
P24. Transported to First Medical Facility By 41
P27. Injury Severity 41
Roadway Section 42
R1. Bridge/Structure Identification Number 42
R2. Roadway Curvature 42
R3. Grade 42
R4. Part of National Highway System 42
R5. Roadway Functional Class 42
R6. Annual Average Daily Traffic 42
R7. Widths of Lane and Shoulder 43
R8. Width of Median 43
R9. Access Control 43
R10. Railway Crossing ID 43
R11. Roadway Lighting 43
R12. Pavement Markings, Longitudinal 44
R13. Presence/Type of Bicycle Facility 44
R14. Mainline Number of Lanes at Intersection 44
R15. Cross-Street Number of Lanes at Intersection 44
R16. Total Volume of Entering Vehicles 44
Fatal Section 45
F1. Attempted Avoidance Maneuver 45
F2. Alcohol Test Type and Results 45
F3. Drug Test Type and Results 45
Large Vehicle and Hazardous Material Section 46
LV1. Commercial Motor Vehicle License Status and Compliance With CDL Endorsements 46
LV7. Motor Carrier Identification 46
LV8. Vehicle Configuration 47
LV9. Cargo Body Type 47
LV10. Hazardous Materials (Cargo Only) 47
Nonmotorist Section 48
NM1. Unit Number of Motor Vehicle Striking Nonmotorist 48
NM2. Nonmotorist Action/Circumstance Prior to Crash 48
NM3. Nonmotorist Contributing Action/Circumstance 48
NM4. Nonmotorist Location at Time of Crash 48
NM5. Nonmotorist Safety Equipment 49
Summary 50
References 52
Table 1. Example Comparison Against Baseline Data 15
Table 2. Example Year-to-Year Comparison 17
Table 3. Crash Data Quality Performance Measures 19
Table 4. Example of Average Timeliness 20
Table 5. Example Timeliness Data for Calculating Median and Mean 21
Table 6. Ratio Measure of Completeness and Uniformity 23
Figure 1. Example Trend Graphic of Timeliness 21