1997 State Highway Accident Rate Tables
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n TRANSPORTATION DEVELOPMENT BRANCH n 1997 STATE HIGHWAY ACCIDENT RATE TABLES Published by Transportation Data Section Accident Data Unit August 1998 OREGON DEPARTMENT OF TRANSPORTATION T A B L E OF C O N T E N T S Part Page Introduction......................................................................................................................3 Results of Analysis...............................................................................................I 5 Facts of Interest...................................................................................................I 6 Table I - Comparison of Motor Vehicle Death Rates.............................................I 7 Table II - 1993-1997 Traffic Accident Rates..........................................................I 8 Table III - Comparison of 1996-1997 Accident Rate Data.....................................I 9 Table IV - Comparative Accident Rates by Jurisdiction.........................................I 10 Highway Numbers, Names and Routes.................................................................I 11 Map - State Highway System................................................................................I 15 Map - Portland System Enlargement...................................................................I 15 Accident Rate Data by Section.............................................................................II 17 Summary of Fatal Traffic Accidents, State of Oregon...........................................III 245 Appendix A: Glossary of Terms and Abbreviations..........................................................251 Page 3 I N T R O D U C T I O N The three parts of this report are: I Results of Analysis containing comparative tables and the Signed Route on Highway list, II Five year accident rate data by highway sections, III A summary of this year's fatal traffic accidents. The first two parts provide data that show crash frequencies in relation to traffic volume and lineal length. Any comparison of accident data, either by count or formula, must recognize the vehicle-miles involved. Failure to evaluate the data in this manner could lead to errors. Part I compares the Oregon to the nationwide traffic death rate. Traveled mileage death rates and population death rates are shown as well as, comparative rates by design types. Freeway, and non-freeway data are presented by urban, suburban and rural subgroups. Part II presents five year accident experience for each highway. Each state highway is divided into urban and rural sections which are further subdivided for analysis. The start milepost, length, number of accidents, average daily traffic, current accident rate, as well as the accident rate for the previous four years is shown for each sub section. Each section and highway is summarized. Part III is a summary of this year's fatal accidents in Oregon. Since 1941, the records of all Oregon motor vehicle traffic accidents have been summarized by the Department of Transportation. This accident data has been made available to the public as well as government agencies. Since 1948, the Department has published traffic accident data. Current accident coding is guided by the "Manual on Classification of Motor Vehicle Traffic Accidents, 1989", published by the National Safety Council. In Oregon, the law requires that any traffic accident on a public roadway which resulted in bodily injury be reported. Accidents in which no person was injured and met the property damage threshold were also required to be reported. In 1997, from January 1 to October 3, the property damage threshold was $500. Since October 4, 1997 the threshold is $1,000. Page 4 -- This page is intentionally left blank Page 5 PART 1 RESULTS OF ANALYSIS Page 6 FACTS OF INTEREST The State Highway System accounted for 19,376,530,561 vehicle-miles of travel during 1997. This was an increase of 3.01 percent from the 1996 total of 18,809,289,873.. The State Highway System had 263 fatal accidents during 1997. This represented a decrease of 2.95 percent from the 271 fatal accidents reported in 1996. The total number of persons killed in 1997 was 305, a decrease of 3.5 percent from the 1996 total of 316. The 1997 accident rate per million vehicle-miles for non-freeway highway was 1.70. This was four and one fourth more times the total freeway accident rate of 0.40 for the same period. This difference between non-freeway and freeway accident rates indicates the greater safety of travel on freeways. An estimated 42,000 traffic deaths for the nation is a slight decrease from the 1996 final figure of 42,065. Oregon, with a total of 520 killed in 1997, shows a decrease from the 522 fatalities in 1996. Page 7 COMPARISON OF MOTOR VEHICLE DEATH RATES 1967 - 1997 Table I portrays annual motor vehicle traffic death rates on mileage and population bases from 1967 to 1997. The figures shown are national Safety Council estimates, based on data from state traffic authorities, national Office of Vital Statistics, and the Federal Highway Administration. TABLE I Traveled-Mileage Death Rates1 Population Death Rates2 YEAR Oregon United States Oregon United States 1997 1.6 1.7 16.3 15.7 1996 1.7 1.7 16.4 15.8 1995 1.9 1.7 18.2 15.8 1994 1.6 1.7 12.8 15.6 1993 1.7 1.7 17.2 15.5 1992 1.6 1.7 15.8 15.4 1991 1.9 1.9 16.5 16.9 1990 2.1 2.1 20.3 18.7 1989 2.4 2.2 23.0 18.9 1988 2.7 2.3 24.4 19.9 1987 2.6 2.4 22.9 20.1 1986 2.7 2.5 23.2 19.8 1985 2.6 2.5 21.0 19.1 1984 2.7 2.6 21.4 19.4 1983 2.7 2.6 20.8 19.0 1982 2.7 3.8 19.5 20.0 1981 3.3 3.2 24.2 22.1 1980 3.3 3.3 24.4 23.5 1979 3.4 3.3 26.5 23.5 1978 3.6 3.3 29.1 23.5 1977 3.7 3.3 28.1 22.7 1976 3.7 3.2 27.2 21.9 1975 3.6 3.4 24.9 21.4 1974 4.4 3.5 29.7 21.9 1973 4.0 4.1 28.5 26.5 1972 4.8 4.3 33.5 27.0 1971 4.8 4.5 31.7 26.7 1970 5.1 4.7 32.9 27.1 1969 5.6 5.0 34.2 27.9 1968 5.4 5.2 31.6 27.8 1967 5.7 5.3 32.8 26.8 1 Number of deaths per 100,000 vehicle miles. 2 Number of deaths per 100,000 population. Page 8 ACCIDENTS ON STATE HIGHWAY SYSTEM Table II shows the comparative five-year accident experience for freeways and non-freeways on the State Highway System, primary and secondary components, and the respective rural and urban portions. Total lengths for the categories are shown for the new year only. TABLE II ACCIDENTS PER MILLION VEHICLE-MILES 1997 1996 1995 1994 1993 Description Miles Rate Rate Rate Rate Rate TOTAL State Highway Stystem 7,493.00 1.11 1.23 1.13 1.12 1.19 Freeways 759.15 0.40 0.58 0.31 0.53 0.59 Non-Freeways 6,733.85 1.70 1.76 1.82 1.62 1.69 Primary System 4,959.93 1.04 1.15 1.07 1.06 1.12 Freeways 743.09 0.39 0.55 0.30 0.50 0.56 Non-Freeways 4,216.84 1.72 1.76 1.86 1.64 1.71 Seconday System 2,533.07 1.47 1.66 1.51 1.50 1.59 Freeways 16.06 0.67 1.20 0.56 1.22 1.29 Non-Freeways 2,517.01 1.62 1.75 1.68 1.54 1.64 RURAL State Highway System 6,783.33 0.61 0.70 0.60 0.63 0.67 Freeways 632.10 0.23 0.32 0.14 0.28 0.31 Non-Freeways 6,151.23 0.91 0.98 0.94 0.88 0.93 Primary System 4,442.40 0.53 0.61 0.52 0.54 0.59 Freeways 630.31 0.23 0.31 0.14 0.27 0.30 Non-Freeways 3,812.09 0.83 0.89 0.89 0.81 0.87 Secondary System 2,340.93 1.11 1.26 1.08 1.10 1.14 Freeways 1.79 0.16 1.13 0.28 1.16 0.85 Non-Freeways 2,339.14 1.14 1.26 1.11 1.10 1.15 URBAN State Highway System 709.67 2.09 2.25 2.19 2.13 2.25 Freeways 127.05 0.70 1.01 0.59 0.96 1.07 Non-Freeways 582.62 3.52 3.53 2.84 3.32 3.43 Primary System 517.53 2.07 2.23 2.16 2.11 2.21 Freeways 112.78 0.69 0.99 0.58 0.93 1.04 Non-Freeways 404.75 3.67 3.63 3.98 3.45 3.55 Secondary System 192.14 2.14 2.39 2.31 2.25 2.42 Freeways 14.27 0.76 1.22 0.61 1.23 1.37 Non-Freeways 177.87 2.93 3.10 3.27 2.79 2.99 RURAL includes both the Rural and Suburban shown in Table IV. Page 9 COMPARISON OF ACCIDENT RATE DATA 1996 to 1997 The calculation of accident rates involves three basic elements: (1) Number of accidents, (2) Length of section (in Miles), and (3) Annual traffic volume Table lll RELATION OF BASIC DATA FOR THE YEARS 1996-1997 No of Section Annual Vehicle Accidents Rate Per Description Accidents Length Miles Per Mile Million Miles STATE HIGHWAY SYSTEM Freeways 1996 4,964 759.18 8,530,151,184 6.54 0.58 1997 3,556 759.15 8,831,553,282 4.68 0.40 Percent -28.36% 0.00% 3.53% -28.36% -30.81% Non- Freeways 1996 18,089 6,733.87 10,279,138,689 2.69 1.76 1997 17,887 6,733.85 10,544,977,279 2.66 1.70 Percent -1.12% 0.00% 2.59% -1.12% -3.61% PRIMARY HIGHWAYS Freeways 1996 4,435 743.12 8,090,207,106 5.97 0.55 1997 3,271 743.09 8,408,139,960 4.40 0.39 Percent -26.25% 0.00% 3.93% -26.24% -29.03% Non- Freeways 1996 14,014 4,216.86 7,946,339,266 3.32 1.76 1997 14,003 4,216.84 8,141,698,390 3.32 1.72 Percent -0.08% 0.00% 2.46% -0.08% -2.48% SECONDARY HIGHWAYS Freeways 1996 529 16.06 439,944,078 32.94 1.20 1997 285 16.06 423,413,322 17.75 0.67 Percent -46.12% 0.00% -3.76% -46.12% -44.02% Non- Freeways 1996 4,075 2,517.01 2,332,799,423 1.62 1.75 1997 3,884 2,517.01 2,403,278,889 1.54 1.62 Percent -4.69% 0.00% 3.02% -4.69% -7.48% Page 10 COMPARATIVE ACCIDENT RATES BY JURISDICTION 1997 The importance of rate comparisons in relation to components of the State Highway System is shown by the rates in Table IV.