Validation of Accident Models for Intersections
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FOREWORD
The existing crash prediction models for rural intersections developed for the Interactive Highway Safety Design Model (IHSDM) require validation and recalibration to improve their credibility and enhance their applicability. This report describes the results of validation and calibration of motor vehicle crash models for rural intersections. Both the validation and recalibration activities were conducted in pursuit of one overriding research objective, which was to make marginal improvements to an existing set of statistical models for predicting crashes at two and fourlane intersections, with the primary intent to be used in the IHSDM.
The five types of intersection models for which conclusions are drawn and recommendations are made are: threelegged stop controlled intersections of twolane roads; fourlegged stop controlled intersections of twolane roads; threelegged stop controlled intersections with two lanes on minor and four lanes on major road; and fourlegged stop controlled intersections with two lanes on minor and four lanes on major road, and signalized intersections of twolane roads.
Copies of this report can be obtained from the Research and Technology Product Distribution Center, 9701 Philadelphia Court, Unit Q, Lanham, MD 20706; telephone: 3015770818; fax: 3015771421; or the National Technical Information Service (NTIS), 5285 Port Royal Road, Springfield, VA 22161; telephone: 7034874650; fax: 7033218547.
Michael F. Trentacoste
Director
Office of Safety
Research and Development
Notice
This document is disseminated under the sponsorship of the
U.S. Department of Transportation in the interest of information exchange. The
U.S. Government assumes no liability for the use of the information contained in this document.
The
U.S. Government does not endorse products or manufacturers. Trademarks or manufacturers' names appear in this report only because they are considered essential to the objective of the document.
Quality Assurance Statement
The Federal Highway Administration (FHWA) provides highquality information to serve Government, industry, and the public in a manner that promotes public understanding. Standards and policies are used to ensure and maximize the quality, objectivity, utility, and integrity of its information. FHWA periodically reviews quality issues and adjusts its programs and processes to ensure continuous quality improvement.
1. Report No.
FHWARD03037 
2. Government Accession No. 
3. Recipient's Catalog No. 
4. Title and Subtitle
Validation of Accident Models for Intersections 
5. Report Date
May 2005 
6. Performing Organization Code 
7. Author(s)
Simon Washington, Bhagwant Persaud, Craig Lyon, and Jutaek Oh 
8. Performing Organization Report No.
None 
9. Performing Organization Name and Address
University of Arizona
Department of Civil Engineering
Tucson, AZ 857210072
Ryerson University
Department of Civil Engineering
350 Victoria Street
Toronto, ON Canada M5B 2K3 
10. Work Unit No. (TRAIS) 
11. Contract or Grant No.
DTFH6100C00073 
12. Sponsoring Agency Name and Address
Department of Transportation
Federal Highway Administration
400 7^{th} Street, SW Room 4110
Washington, DC 205900001 
13. Type of Report and Period Covered
Research Report
11/2000 to 12/2003 
14. Sponsoring Agency Code 
15. Supplementary Notes
Joe Bared, HRDS05, Contracting Officer's Technical Representative 
16. Abstract
This report describes the results of validation and calibration of motor vehicle crash models for rural intersections. Both the validation and recalibration activities were conducted in pursuit of one overriding research objective, which was to make marginal improvements to an existing set of statistical models for predicting crashes at two and four lane intersections, with the primary intent to be used in the Interactive Highway Safety Design Module (IHSDM).
The five types of intersection models for which conclusions are drawn and recommendations are made are: Threelegged stop controlled intersections of twolane roads; fourlegged stop controlled intersections of twolane roads; threelegged stop controlled intersections with two lanes on minor and four lanes on major road; and fourlegged stop controlled intersections with two lanes on minor and four lanes on major road, and signalized intersections of twolane roads. 
17. Key Words
Accident modification factors, traffic safety, signalized intersections, crash models, crash model validation, Interactive Highway Safety Design Model 
18. Distribution Statement 
19. Security Classif. (of this report)
Unclassified 
20. Security Classif. (of this page)
Unclassified 
21. No. of Pages
311 
22. Price 
SI* (Modern Metric) Conversion Factors
TABLE OF CONTENTS
EXECUTIVE SUMMARY
VALIDATION FINDINGS
RECALIBRATION FINDINGS
RECOMMENDATIONS
1. INTRODUCTION
2. VALIDATION OF ACCIDENT MODELS
3. RECALIBRATION
APPENDIX A: ALL MODELS IN THE REPORTS OF RELEVANCE
APPENDIX B: MODELS VALIDATED
APPENDIX C: DESCRIPTIVE STATISTICS FOR FULL DATASETS BY STATE
APPENDIX D: CURE PLOTS FOR TYPE I, II, III, IV, AND V AADT MODELS
REFERENCES
LIST OF FIGURES
Figure 1. Observed versus Predicted Accident Frequency: Total Accidents Type I
Figure 2. Observed versus Predicted Accident Frequency: Injury Accidents Type I
Figure 3. Observed versus Predicted Accident Frequency: Total Accidents Type II
Figure 4. Observed versus Predicted Accident Frequency: Injury Accidents Type II
Figure 5. Observed versus Predicted Accident Frequency: TOTACC Type II
Figure 6. Observed versus Predicted Accident Frequency: TOTACCI Type III
Figure 7. Observed versus Predicted Accident Frequency: Injury Variant 1
Figure 8. Observed versus Predicted Accident Frequency: Injury Variant 2
Figure 9. Observed versus Predicted Accident Frequency: TOTACC
Figure 10. Observed versus Predicted Accident Frequency: TOTACCI
Figure 11. Observed versus Predicted Accident Frequency: INJACC
Figure 12. Observed versus Predicted Accident Frequency: INJACCI
Figure 13. Observed versus Predicted Accident Frequency: TOTACC Main Model
Figure 14. Observed versus Predicted Accident Frequency: TOTACC Variant 1
Figure 15. Observed versus Predicted Accident Frequency: TOTACCI Main Model
Figure 16. Observed versus Predicted Accident Frequency: TOTACCI Variant 3
Figure 17. Observed versus Predicted Accident Frequency: INJACC
Figure 18. Observed versus Predicted Accident Frequency: INJACCI
Figure 19. CURE Plot for Type III TOTACC AADT Model
Figure 20. CURE Plot for Type III TOTACC AADT Model Using the CURE Method: Alternative Model
Figure 21. CURE Plot for Alternate TOTACC Type I Group A Model
Figure 22. CURE Plot for TOTACC Type I Group A Model
Figure 23. CURE Plot for Type I TOTACC AADT Model
Figure 24. CURE Plot for Type II TOTACC AADT Model
Figure 25. CURE Plot for Type III TOTACC AADT Model
Figure 26. CURE Plot for Type IV TOTACC AADT Model
Figure 27. CURE Plot for Type V TOTACC AADT Model
LIST OF TABLES
Table 1. Basic Statistics for the Data Sources
Table 2. Validation Statistics from Original Report^{1}
Table 3. Accident Summary Statistics for Type I Sites
Table 4. Parameter Estimates for Type I Total Accident Model Using Additional Years of Data
Table 5. Validation Statistics for Type I Total Accident Model Using Additional Years of Data
Table 6. Parameter Estimates for Type I Total Accident Model Using Washington Data
Table 7. Validation Statistics for Type I Total Accident Model Using Washington Data
Table 8. Parameter Estimates for Type I Injury Accident Model Using Additional Years of Data
Table 9. Validation Statistics for Type I Injury Accident Model Using Additional Years of Data
Table 10. Parameter Estimates for Type I Injury Accident Model Using Washington Data
Table 11. Validation Statistics for Type I Injury Accident Model Using Washington Data
Table 12. Accident Summary Statistics for Type II Sites
Table 13. Parameter Estimates for Type II Total Accident Model Using Additional Years of Data
Table 14. Validation Statistics for Type II Total Accident Model Using Additional Years of Data
Table 15. Parameter Estimates for Type II Total Accident Model Using Washington Data
Table 16. Validation Statistics for Type II Total Accident Model Using Washington Data
Table 17. Parameter Estimates for Type II Injury Accident Model Using Additional Years of Data
Table 18. Validation Statistics for Type II Injury Accident Model Using Additional Years of Data
Table 19. Parameter Estimates for Type II Injury Accident Model Using Washington Data
Table 20. Validation Statistics for Type II Injury Accident Model Using Washington Data
Table 21. Accident Summary Statistics of Type III Sites
Table 22. Parameter Estimates for TOTACC Type III Model Using Additional Years of Data
Table 23. Validation Statistics for TOTACC Type III Model Using Additional Years of Data
Table 24. Parameter Estimates for TOTACCI Type III Model Using Additional Years of Data
Table 25. Validation Statistics for TOTACCI Type III Model Using Additional Years of Data
Table 26. Parameter Estimates for INJACC Type III Model Using Additional Years of Data: Variant 1
Table 27. Validation Statistics for INJACC Type III Model Using Additional Years of Data: Variant 1
Table 28. Parameter Estimates for INJACC Type III Model Using Additional Years of Data: Variant 2
Table 29. Validation Statistics for INJACC Type III Model Using Additional Years of Data: Variant 2
Table 30. Accident Summary Statistics of Type IV Sites
Table 31. Parameter Estimates for TOTACC Type IV Model Using Additional Years of Data
Table 32. Validation Statistics for TOTACC Type IV Model Using Additional Years of Data
Table 33. Parameter Estimates for TOTACCI Type IV Model Using Additional Years of Data
Table 34. Validation Statistics for TOTACCI Type IV Model Using Additional Years of Data
Table 35. Parameter Estimates for INJACC Type IV Model Using Additional Years of Data
Table 36. Validation Statistics for INJACC Type IV Model Using Additional Years of Data
Table 37. Parameter Estimates for INJACCI Type IV Model Using Additional Years of Data
Table 38. Validation Statistics for INJACCI Type IV Model Using Additional Years of Data
Table 39. Accident Summary Statistics of Type V Sites
Table 40. Parameter Estimates for TOTACC Type V Model Using Additional Years of Data: Main Model
Table 41. Validation Statistics for TOTACC Type V Model Using Additional Years of Data: Main Model
Table 42. Parameter Estimates for TOTACC Type V Model Using Additional Years of Data: Variant 1
Table 43. Validation Statistics for TOTACC Type V Model Using Additional Years of Data: Variant 1
Table 44. Parameter Estimates for TOTACCI Type V Model Using Additional Years of Data: Main Model
Table 45. Validation Statistics for TOTACCI Type V Model Using Additional Years of Data: Main Model
Table 46. Parameter Estimates for TOTACCI Type V Model Using Additional Years of Data: Variant 3
Table 47. Validation Statistics for TOTACCI Type V Model Using Additional Years of Data: Variant 3
Table 48. Parameter Estimates for INJACC Type V Model Using Additional Years of Data
Table 49. Validation Statistics for INJACC Type V Model Using Additional Years of Data
Table 50. Parameter Estimates for INJACCI Type V Model Using Additional Years of Data
Table 51. Validation Statistics for INJACCI Type V Model Using Additional Years of Data
Table 52. Summary of Georgia versus Minnesota Data for Type I Sites
Table 53. Parameter Estimates for Type I Total Accident Model Using Georgia Data
Table 54. Validation Statistics for Type I Total Accident Model Using Georgia Data
Table 55. Parameter Estimates for Type I lnjury Accident Model Using Georgia Data
Table 56. Validation Statistics for Type I Injury Accident Model Using Georgia Data
Table 57. Summary of Georgia versus Minnesota Data for Type II Sites
Table 58. Parameter Estimates for Type II Total Accident Model Using Georgia Data
Table 59. Validation Statistics for Type II Total Accident Model Using Georgia Data
Table 60. Parameter Estimates for Type II Injury Accident Model Using Georgia Data
Table 61. Validation Statistics for Type II Injury Accident Model Using Georgia Data
Table 62. Summary Statistics of Georgia Data: Type III Sites
Table 63. Parameter Estimates for TOTACC Type III Model Using Georgia Data
Table 64. Validation Statistics for TOTACC Type III Model Using Georgia Data
Table 65. Parameter Estimates for TOTACCI Type III Model Using Georgia Data
Table 66. Validation Statistics for TOTACCI Type III Model Using Georgia Data
Table 67. Parameter Estimates for INJACC Type III Model Using Georgia Data: Variant 1
Table 68. Validation Statistics for INJACC Type III Model Using Georgia Data: Variant 1
Table 69. Parameter Estimates for INJACC Type III Model Using Georgia Data: Variant 2
Table 70. Validation Statistics for INJACC Type III Model Using Georgia Data: Variant 2
Table 71. Summary Statistics of Georgia Data: Type IV
Table 72. Summary Statistics of California, Michigan, and Georgia
Table 73. Pearson Correlations: Original, Georgia, and California
Table 74. Parameter Estimates for TOTACC Type IV Model Using Georgia Data
Table 75. Validation Statistics for TOTACC Type IV Model Using Georgia Data
Table 76. Parameter Estimates for TOTACCI Type IV Model Using Georgia Data
Table 77. Validation Statistics for TOTACCI Type IV Model Using Georgia Data
Table 78. Parameter Estimates for INJACC Type IV Model Using Georgia Data
Table 79. Validation Statistics for INJACC Type IV Model Using Georgia Data
Table 80. Parameter Estimates for INJACCI Type IV Model Using Georgia Data
Table 81. Validation Statistics for INJACCI Type IV Model Using Georgia Data
Table 82. Summary Statistics of Georgia Data: Type V
Table 83. Summary Statistics for Three States: California, Michigan, and Georgia^{1}
Table 84. Parameter Estimates for TOTACC Type V Model Using Georgia Data: Main Model
Table 85. Validation Statistics for TOTACC Type V Model Using Georgia Data: Main Model
Table 86. Parameter Estimates for TOTACC Type V Model Using Georgia Data: Variant 1
Table 87. Validation Statistics for TOTACC Type V Model Using Georgia Data: Variant 1
Table 88. Parameter Estimates for TOTACCI Type V Model Using Georgia Data: Main Model
Table 89. Validation Statistics for TOTACCI Type V Model Using Georgia Data: Main Model
Table 90. Parameter Estimates for TOTACC Type V Model Using Georgia Data: Variant 3
Table 91. Validation Statistics for TOTACCI Type V Model Using Georgia Data: Variant 3
Table 92. Parameter Estimates for INJACC Type V Model Using Georgia Data
Table 93. Validation Statistics for INJACC Type V Model Using Georgia Data
Table 94. Parameter Estimates for INJACCI Type V Model Using Georgia Data
Table 95. Validation Statistics for INJACC Type V Model Using Georgia Data
Table 96. Summary Accident Statistics for Sites Meeting Base Conditions
Table 97. Validation Statistics for Type I Base Model Intersections
Table 98. Summary Accident Statistics for Sites Meeting Base Conditions
Table 99. Validation Statistics for Type II Base Model Intersections
Table 100. Validation Statistics for Type V Base Model Intersections
Table 101. The AMFs for Type I, II, and V Intersections
Table 102. Validation Statistics for the Accident Prediction Algorithm: Type I
Table 103. Validation Statistics for the Accident Prediction Algorithm: Type I Sites with a Major Road Turning Lane
Table 104. Validation Statistics for the Accident Prediction Algorithm: Type II
Table 105. Validation Statistics for the Accident Prediction Algorithm: Type II Sites with a Major Road Turning Lane
Table 106. Validation Statistics for the Accident Prediction Algorithm: Type V
Table 107. Validation Statistics for the Accident Prediction Algorithm: Type V Sites with a Major Road RightTurn Lane
Table 108. Sources of Data
Table 109. Summary Statistics for Type I Sites
Table 110. Correlation Between Crashes and Independent Variables for Type I Sites
Table 111. Summary of Correlations for Independent Variables for Type I Sites
Table 112. Summary Statistics for Type II Sites
Table 113. Correlation Between Crashes and Independent Variables for Type II Sites
Table 114. Summary of Correlations for Independent Variables for Type II Sites
Table 115. Summary Statistics for Type III Sites
Table 116. Correlation Between Crashes and Independent Variables for Type III Sites
Table 117. Summary of Correlations for Independent Variables for Type III Sites
Table 118. Summary Statistics for Type IV Sites
Table 119. Correlation Between Crashes and Independent Variables for Type IV Sites
Table 120. Summary of Correlations for Independent Variables for Type IV Sites
Table 121. Summary Statistics for Type V Sites
Table 122. Correlation Between Crashes and Independent Variables for Type V Sites
Table 123. Summary of Correlations for Independent Variables for Type V Sites
Table 124. Summary of AADT Models Recalibrated and Data Used
Table 125. Group B Base Conditions for Type I to IV AADT Models
Table 126. Group A Base Conditions for Type III TOTACC AADT Models
Table 127. Group A Base Conditions for Type III INJACC AADT Models
Table 128. Group A Base Conditions for Type IV TOTACC AADT Models
Table 129. Group A Base Conditions for Type IV INJACC AADT Models
Table 130. Group A Base Conditions for Type V TOTACC AADT Models
Table 131. Group A Base Conditions for Type V INJACC AADT Models
Table 132. Number of Sites Used for Type I Main and Group B Base AADT Models
Table 133. Summary Statistics for Type I Sites: Main and Group B Base AADT Models
Table 134. Parameter Estimates for Recalibrated TOTACC Type I: Main and Group B AADT Models
Table 135. Parameter Estimates for Recalibrated INJACC Type I: Main and Group B AADT Models
Table 136. Number of Sites Used for Type II Main and Group B Base AADT Models
Table 137. Summary Statistics for Type II Sites: Main and Group B Base AADT Models
Table 138. Parameter Estimates for Recalibrated TOTACC Type II: Main and Group B AADT Models
Table 139. Parameter Estimates for Recalibrated INJACC Type II: Main and Group B AADT Models
Table 140. Number of Sites Used for Type III Main and Group B Base Condition AADT Models
Table 141. Summary Statistics for Type III Sites: Main and Group B Base AADT Models
Table 142. Parameter Estimates for Recalibrated TOTACC Type III: Main and Group B Base AADT Models
Table 143. Parameter Estimates for Recalibrated INJACC Type III: Main and Group B Base AADT Models
Table 144. Summary Statistics for Type III Sites: Group A Base AADT Models
Table 145. Parameter Estimates for Type III Group A TOTACC and INJACC Base Models
Table 146. Number of Sites Used for Type IV Main and Group B Base Condition AADT Models
Table 147. Summary Statistics for Type IV Sites: Main and Group B Base AADT Models
Table 148. Parameter Estimates for Recalibrated TOTACC Type IV: Main and Group B Base AADT Models
Table 149. Parameter Estimates for Recalibrated INJACC Type IV: Main and Group B Base AADT Models
Table 150. Summary Statistics for Type IV Sites: Group A Base AADT Models
Table 151. Parameter Estimates for Type IV Group A TOTACC and INJACC Base Models
Table 152. Number of Sites Used for Type V Main AADT Model
Table 153. Summary Statistics for Type V Sites: Main AADT Model
Table 154. Parameter Estimates for Recalibrated TOTACC Type V: Main AADT Model
Table 155. Parameter Estimates for Recalibrated INJACC Type V: Main AADT Model
Table 156. Summary Statistics for Type V Sites: Group A Base AADT Models
Table 157. Parameter Estimates for Type V Group A TOTACC and INJACC Base Models
Table 158. Summary of Models Recalibrated and Data Used
Table 159. Parameter Estimates for Recalibrated TOTACC Full Models: Type I Group A
Table 160. Parameter Estimates for Recalibrated INJACC Full Models: Type I Group A
Table 161. Parameter Estimates for Recalibrated TOTACC Full Models: Type I Group B
Table 162. Parameter Estimates for Recalibrated INJACC Full Models: Type I Group B
Table 163. Parameter Estimates for Recalibrated TOTACC Full Models: Type II Group A
Table 164. Parameter Estimates for Recalibrated INJACC Full Models: Type II Group A
Table 165. Parameter Estimates for Recalibrated TOTACC Full Models: Type II Group B
Table 166. Parameter Estimates for Recalibrated INJACC Full Models: Type II Group B
Table 167. Parameter Estimates for Recalibrated TOTACC Full Models: Type III
Table 168. Parameter Estimates for Recalibrated INJACC Full Models: Type III
Table 169. Parameter Estimates for Recalibrated TOTACC Full Models: Type IV
Table 170. Parameter Estimates for Recalibrated INJACC Type IV: Full Models
Table 171. Parameter Estimates for Recalibrated TOTACC Full Models: Type V
Table 172. Parameter Estimates for Recalibrated INJACC Full Models: Type V
Table 173. AMFs from Previous Studies
Table 174. AMFs Derived from Type I and II Full Models
Table 175. AMFs Derived from Type III, IV, and V Full Models
Table 176. AMFs Estimated from Regression Procedure
Table 177. Base Conditions for Type III Sites
Table 178. Base Model for Type III Sites
Table 179. AMFs for Type III Sites
Table 180. Base Conditions for Type IV Sites
Table 181. Base Model for Type IV Sites
Table 182. AMFs for Type IV Sites
Table 183. Base Conditions for Type V Sites
Table 184. Base Model for Type V Sites
Table 185. Comparison of Type III AMFs for TOTACC
Table 186. Comparison of Type IIIV AMFs for TOTACC
Table 187. Comparison of AMFs for INJACC
Table 188. Sensitivity of Safety to HI1 for Type I TOTAL Accidents Per Year
Table 189. Sensitivity of Safety to RT MAJ for Type I TOTAL Accidents Per Year
Table 190. Sensitivity of Safety to RT MIN for Type I TOTAL Accidents Per Year
Table 191. Sensitivity of Safety to LT MAJ for Type I TOTAL Accidents Per Year
Table 192. Sensitivity of Safety to HI1 for Type I INJURY Accidents Per Year
Table 193. Sensitivity of Safety to RT MAJ for Type I INJURY Accidents Per Year
Table 194. Sensitivity of Safety to RT MIN for Type I INJURY Accidents Per Year
Table 195. Sensitivity of Safety to LT MAJ for Type I INJURY Accidents Per Year
Table 196. Sensitivity of Safety to DRWY1 for Type II TOTAL Accidents Per Year
Table 197. Sensitivity of Safety to RT MAJ for Type II TOTAL Accidents Per Year
Table 198. Sensitivity of Safety to LT MAJ for Type II TOTAL Accidents Per Year
Table 199. Sensitivity of Safety to MEDIAN for Type II TOTAL Accidents Per Year
Table 200. Sensitivity of Safety to HI1 for Type II INJURY Accidents Per Year
Table 201. Sensitivity of Safety to DRWY1 for Type II INJURY Accidents Per Year
Table 202. Sensitivity of Safety to RT MAJ for Type II INJURY Accidents Per Year
Table 203. Sensitivity of Safety to LT MAJ for Type II INJURY Accidents Per Year
Table 204. Sensitivity of Safety to MEDIAN for Type II INJURY Accidents Per Year
Table 205. Sensitivity of Safety to Skew Angles for Type III TOTAL Accidents Per Year
Table 206. Sensitivity of Safety to Commercial Driveways on Major Road for Type III TOTAL Accidents Per Year
Table 207. Sensitivity of Safety to Vertical Curves on Major Road (VEI1) for Type III TOTAL Accidents Per Year
Table 208. Sensitivity of Safety to Median Width on Major Road (MEDWIDTH1) for Type III TOTAL Accidents Per Year
Table 209. Sensitivity of Safety to Painted Median Type on Major Road (MEDTYPE1) for Type III TOTAL Accidents Per Year
Table 210. Sensitivity of Safety to Major Road LeftTurn Lane for Type III TOTAL Accidents Per Year
Table 211. Sensitivity of Safety to Skew Angles for Type III INJURY Accidents Per Year
Table 212. Sensitivity of Safety to Commercial Driveways on Major Road for Type III INJURY Accidents Per Year
Table 213. Sensitivity of Safety to Hazard Rating on Major Road (HAZRAT1) for Type III INJURY Accidents Per Year
Table 214. Sensitivity of Safety to Peak Truck Percentage (PKTRUCK) for Type III TOTAL Accidents Per Year
Table 215. Sensitivity of Safety to Peak Turning Percentage (PKTURN) for Type III TOTAL Accidents Per Year
Table 216. Sensitivity of Safety to Skew Angles for Type IV TOTAL Accidents Per Year
Table 217. Sensitivity of Safety to Right Sight Distance from Minor Road (SDR2) for Type IV TOTAL Accidents Per Year
Table 218. Sensitivity of Safety to Peak Truck Percentage (PKTRUCK) for Type III TOTAL Accidents Per Year
Table 219. Sensitivity of Safety to Peak Through Percentage on Minor Road (PKTHRU2) for Type IV TOTAL Accidents Per Year
Table 220. Sensitivity of Safety to Peak LeftTurn Percentage (PKLEFT) for Type IV TOTAL Accidents Per Year
Table 221. Sensitivity of Safety to Skew Angles for Type IV INJURY Accidents Per Year
Table 222. Sensitivity of Safety to Major RightTurn Lane for Type IV INJURY Accidents Per Year
Table 223. Sensitivity of Safety to Peak Truck Percentage (PKTRUCK) for Type IV INJURY Accidents Per Year
Table 224. Sensitivity of Safety to Peak LeftTurn Percentage (PKLEFT) for Type IV INJURY Accidents Per Year
Table 225. Sensitivity of Safety to Commercial Driveways on Major Road for Type V TOTAL Accidents Per Year
Table 226. Sensitivity of Safety to Horizontal Curve Combinations on Major and Minor Roads (HEICOM) for Type III TOTAL Accidents Per Year
Table 227. Sensitivity of Safety to Light for Type IV TOTAL Accidents Per Year
Table 228. Sensitivity of Safety to Horizontal Curves on Minor Road (HEI2) for Type IV TOTAL Accidents Per Year
Table 229. Sensitivity of Safety to Light for Type IV TOTAL Accidents Per Year
Table 230. Summary of Models Recalibrated and Data Used
Table 231. Comparison of Type IIIV AMFs for TOTACC
Table 232. Comparison of Type III AMFs for TOTACC
Table 233. Comparison of Type IIIV AMFs for TOTACC
Table 234. Comparison of AMFs for INJACC
Table 235. AADT Models Recommended for Use in IHSDM
Table 236. Full Models Recommended for Use in Crash Prediction
Table 237. All Models in the Reports of Relevance
Table 238. Models Validated
Table 239. Summary Statistics for Type I Sites by State
Table 240. Summary Statistics for Type II Sites by State
Table 241. Summary Statistics for Type III Sites by State: California (CA), Michigan (MI), and Georgia (GA)
Table 242. Summary Statistics for Type IV Sites by State: California (CA), Michigan (MI), and Georgia (GA)
Table 243. Summary Statistics for Type V Sites by State: California (CA), Michigan (MI), and Georgia (GA)
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