Accident Models for TwoLane Rural Roads: Segment and Intersections
LIST OF TABLES
1. Variables collected in the study
2. Summary Statistics: 619 Segments, Minnesota State
3. Summary Statistics: 712 Segments, Washington State
4. Summary Statistics: 389 ThreeLegged Intersections, Minnesota State
5. Summary Statistics: 181 ThreeLegged Intersections, Washington State
6. Summary Statistics: 327 FourLegged Intersections, Minnesota State
7. Summary Statistics: 90 FourLegged Intersections, Washington State
8. Bivariate Statistics: Segment Accidents versus Other Variables
9. Bivariate Statistics: 3Legged Intersection Accidents versus Other Variables
10. Bivariate Statistics: 4Legged Intersection Accidents versus Other Variables
11. Correlations between Segment Variables in MN and WA Samples
12. Correlations between 3Legged Intersection Variables in MN and WA Samples
13. Correlations between 4Legged Intersection Variables in MN and WA Samples
14. Correlations between Weather and Minnesota Highway Variables
15. Minnesota Segments, Poisson Models with Exposure Variables
16. Washington Segments, Poisson Models with Exposure Variables
17. Combined Segments, Poisson Models with Exposure Variables
18. Poisson Models of Segments with Lane and Surface Width
19. Poisson Models of Segments with TOTWIDTH
20. Poisson Models of Segments with TOTWIDTH, H, and VC
21. Poisson Models of Segments with TOTWIDTH, H, and VMC
22. Poisson Models for Segment Accidents
23. Additional Poisson Models for Segment Accidents
24. Negative Binomial Models for Segment Accidents
25. Negative Binomial Models for Segment Injury Accidents
26. Extended Negative Binomial Models for Segment Accidents
27. Final Extended Negative Binomial Model for Segment Accidents
28. Extended Negative Binomial Models for Segment Injury Accidents
29. Poisson Models, 3Legged Intersections Accidents
30. Poisson Models, 4Legged Intersection Accidents
31. Negative Binomial Models, 3Legged Intersection Accidents
32. Negative Binomial Models, 4Legged Intersection Accidents
33. Additional Negative Binomial Models, Combined (MN/WA) Intersection Accidents
34. Additional Negative Binomial Models, Minnesota Intersection Accidents
35. Final Negative Binomial Models, Minnesota Intersection Accidents
36. Negative Binomial Models, 3Legged Intersection Injury Accidents
37. Negative Binomial Models, 4Legged Intersection Injury Accidents
38. Logistic Model for Serious Accident Probability, Minnesota Segments
39. Logistic Model for Serious Accident Probability, MN 3Legged Intersections.
40. Logistic Model for Serious Accident Probability, MN 4Legged Intersections
41. Validation of Minnesota Models with 19901993 Minnesota Data
42. Validation of Minnesota Models with 19931995 Washington Data
43. Validation of Adjusted MN Segment Model with 19931995 WA Data
44. Validation of Adjusted WA Segment Model with 19851989 MN Data
45. Validation of Combined Segment Model with 19901993 MN Data
46. Accident Variation by Groups of Covariates, Final Segment Model
47. Accident Variation by Groups of Covariates, Final Intersection Models
48. Cumulative Scaled Residuals versus Increasing Value of Variables, Final Models
49. Accident Reduction Factors for the Final Models
LIST OF FIGURES
1. ACCIDENT RATES ON NONINTERSTATE HIGHWAYS FOR SELECTED HIGHWAY TYPES BY NUMBER OF BUSINESSES PER MILE (Cirillo, 1992)
2. A TYPICAL NEURAL NETWORK
3. A VERTICAL CURVE
4. INTERSECTION ANGLE GEOMETRIES
5. EXAMPLES OF CALCULATION OF THE ANGLE VARIABLE HAU
6. GRAPH OF ACCIDENT VARIATION BY GROUPS OF COVARIATES, Final Segment Model
7. GRAPH OF ACCIDENT VARIATION BY GROUPS OF COVARIATES, Final Intersection Models
8. CUMULATIVE SCALED RESIDUAL VERSUS EXPOSURE (MVM)
9. CUMULATIVE SCALED RESIDUAL VERSUS DEGREE OF CURVE H
10. CUMULATIVE SCALED RESIDUAL VERSUS CREST CURVE GRADE RATE VC
11. CUMULATIVE SCALED RESIDUAL VERSUS ABSOLUTE GRADE GR
12. CUMULATIVE SCALED RESIDUAL VERSUS ADT1, 3Legged Intersections
13. CUMULATIVE SCALED RESIDUAL VERSUS ADT2, 3Legged Intersections
14. CUMULATIVE SCALED RESIDUAL VERSUS ADT1, 4Legged Intersections
15. CUMULATIVE SCALED RESIDUAL VERSUS ADT2, 4Legged Intersections
