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Abstract
Subjects were exposed to low levels (700 ppm) of carbon monoxide (CO) until carboxyhemoglobin (COHb) levels of 6%, 11%, and 17% were reached, and they were then tested as to their ability to perform both selected driving-related laboratory tests of visual response and control reactions and over-the-road vehicle driving. These test results were then compared with those on the same subjects taken under control conditions without exposure to CO.
The overall pattern of results indicates that a 6% COHb level had no effect on driving ability, and that COHb levels of 11 % and 17% did not appear to seriously affect the ability to drive motor vehicles, as measured by the tests administered in this study. However, certain statistically significant differences were found in some of the tests that suggest some decrement in performance as a result of CO exposure.