FIELD STUDY TO DETERMINE THE EFFECTS OF MARIJUANA AND ALCOHOL ON DRIVING PERFORMANCE

Authors
  1. Noy, I.
  2. Smiley, A.
  3. Tostowaryk, W.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Department of Transport, Toronto ONT (CAN) Road Safety Unit
Abstract
A closed-course study is described which examined the effect on driving of marijuana alone and in combination with alcohol under typical conditions of social use. Three levels of marijuana (0, 100, 200 mcg/kg) were tested in combination with three levels of alcohol (0, .05%, .08% BAC); however, active marijuana was not combined with alcohol at .08% BAC. The study attempted to enhance ecological validity by administering the drugs to groups of subjects in a party-like atmosphere in the evening, driving at night as well as the morning after, and through the use of non-invasive toxicological techniques. Sixty-two young male subjects who were moderate users of marijuana and alcohol were tested. Twenty-two measures of driving performance were recorded in an instrumented car as the drivers performed seven driving tasks. The driving tasks were representative of normal driving and presented conditions found to be associated with drug-involved collisions. TRUNCATED
Report Number
85-R-24 —
Date of publication
15 Jun 1985
Number of Pages
160
DSTKIM No
85-03393
CANDIS No
48156
Format(s):
Hardcopy;Originator's fiche received by DSIS

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