The study represents completion of evaluative inquiries into the effectiveness of Motor Vehicles Driver Improvement Program in Oregon. It develops descriptive and analytical indices providing additional information of the adequacy of driver license suspensions as control measures. It specifically develops statistical data for evaluation of suspension on driver performance; ascertains the extent to which suspended drivers respect their restrictions; generates data on this sub-population's characteristics. The study was conducted in separate parts: 1) Performance of suspended drivers' descriptive and analytical data (age & sex, driving records and suspension circumstances, court response to citations), was based on a one month sample of 505 add-year causes. 2) A random sample of 756 drivers constituted a descriptive analysis of typical drivers whose license had been suspended. Seven data categories were considered, including above and licensing data, prior actions, driving and police records. 3) A mail questionnaire and letters were sent to a sample of reinstated drivers in a three state survey, content and signatures differing. Later data was combined providing a pooled sample of 250 mailed questionnaires. 4) An equivalent control group from a pool of drivers eligible for suspension were divided into five treatment conditions, half in a no contact group (control). The results were as follows: 1) Radical differences between this group and other highway users; drivers averaged age 26, negligent operators, had past records, five in eight had no legal license. 2) A very young group persistently involved in traffic citations, collisions and criminal acts. 3) 44% of questionnaires were completed and returned. Over 1/2 drove during suspension, more carefully, the young with fewer convictions returned their forms. 4) Traditional suspensions and warning letters are not effective; probationary licenses have positive effect; defensive driving course positive, especially on young drivers.

  • Supplemental Notes:
    • Research sponsored by the National Highway Traffic Safety Administration, Washington, D.C.
  • Corporate Authors:

    Oregon Department of Transportation

    140 Highway Building
    Salem, OR  United States  97310
  • Authors:
    • Kaestner, N
    • Speight, L
  • Publication Date: 1974-4

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 116 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00095486
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Created Date: Jul 2 1975 12:00AM