AN ANALYSIS OF TOTAL PROJECT IMPACT. SD:ASAP ANALYTIC STUDY NO. 1--1975

The current study examined 27 statewide and regional sub- sets of motor vehicle crash data in order to assess the impact of SD:ASAP. A general linear model analysis of variance was utilized to assess drift, change in level and change in drift. Series' were inspected for auto- correlation and seasonally adjusted as necessary. Reported alcohol related fatal and injury accidents increased in drift during the same period. Possible decrease in level of the series due to the change in speed limit was controlled delete for statistically. comparison of fatal and injury accidents with the non-ASAP states of North Dakota and Wyoming was also carried out with a general linear model analysis of variance. There was a significantly greater decrease in drift for South Dakota injury accidents than for control states during the same time period. BAC data obtained from roadside surveys during the SD; ASAP operational period did not indicate a decrease in BAC levels for the second half of the operational period as compared to the first half. Mean BACs of individuals arrested for DWI during the baseline period and operational period (0.212 vs. 0.193) were significantly different. Because of a number of confounding factors (improved police sensitivity, change in presumptive level of intoxication, etc.), BAC data was considered generally unreliable and not sensitive to project effect. Comparisons of crash involved drivers who had been drinking with crash involved sober drivers for the years 1972-1974 indicated that they differed with respect to age and sex and also the time of day and day of week of the accident. Comparison of fatal, injury, and property damage crash driver groups between baseline and operational years of SD:ASAP indicated a greater proportion of fatal accidents were reported as alcohol related during the operational period. Cost analysis of SD:ASAP indicated a substantial saving to society affected by the implementation of the project.

• Supplemental Notes:
  • Project sponsored by Alcohol Safety Action Project, Pierre, South Dakota and National Highway Traffic Safety Administration, Washington, D.C.
• Corporate Authors:

  University of South Dakota, Vermillion

  Human Factors Laboratory
  Vermillion, SD  United States  57069
• Authors:
  • Westra, D P
  • Ellingstad, V S
• Publication Date: 1975-5

Media Info

• Features: Figures; References; Tables;
• Pagination: 318 p.

Subject/Index Terms

• TRT Terms: Blood alcohol levels; Data analysis; Drunk drivers; Drunk driving; Fatalities; Injuries; Mathematical analysis; Speed limits; Traffic crashes; Variance
• Identifier Terms: Alcohol Safety Action Program
• Uncontrolled Terms: Motor vehicle accidents
• Old TRIS Terms: Asap (Alcohol safety action program)
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00141996
• Record Type: Publication
• Source Agency: Highway Safety Research Institute
• Contract Numbers: DOT-HS-045-1-061
• Files: TRIS
• Created Date: Aug 4 1977 12:00AM