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In this study, 150 subjects observed a 25-minute video driving sequence containing 45 highway traffic situations to which they were expected to respond by manipulation of simulated vehicle controls. Each situation occurred under five conditions of distraction: placing a cellular phone call, carrying on a causal cellular phone conversation, carrying on an(More)
The per-mile accident rate of 16-year-old novices is approximately 10 times that of adults, a difference that has been attributed to the immaturity of youth and the errors of inexperience. Research separating the two influences shows that, over the first few years, the effects of experience greatly exceed those of age, with reductions of approximately(More)
The legal limits of blood alcohol concentration (BAC) for operators of commercial vehicles throughout the United States, and underage drivers in most states, are approximately half the 0.08-0.10% imposed on other drivers. Easily administered measures involving performance and appearance are needed to establish probable cause for requesting breath tests.(More)
A computerized measure of 22 visual, attentional, perceptual, cognitive and psychomotor abilities and a structured road test were administered to 407 elderly drivers age 62 and above. Approximately two-thirds of the sample had been referred to licensing agencies on the basis of observed unsafe incidents and the remainder were volunteers free of reported(More)
With the current trends in climate and fisheries, well-designed mitigative strategies for conserving fish stocks may become increasingly necessary. The poor post-release survival of hatchery-reared Pacific salmon indicates that salmon enhancement programs require assessment. The objective of this study was to determine the relative roles that genotype and(More)
This study assessed the effects of motorcycle helmets upon seeing and hearing by having 50 riders operate over a test route, changing lanes in response to an audible signal under three helmet conditions: none, partial coverage, and full coverage. Half of the subjects were assessed for the degree of head rotation during the lane changes, while the other half(More)
The per-mile crash rate of drivers under age 20 is over five times that of the adult population in general, while that of 16-year-old novices is approximately ten times that of adults. Reports of over 2,000 non-fatal crashes involving young drivers were analyzed for behavioral crash contributors as a step in orienting preventive efforts. The great majority(More)
A sobriety test capable of being administered on boats was developed as an aid in establishing probable cause to request a breath sample of recreational boat operators suspected of being over the legal alcohol limit. In a laboratory phase some 12 candidate measures suitable for use in a boating environment were assessed for their relationship to blood(More)
The combined effect of lane line width and line-pavement contrast upon lanekeeping was studied through simulation. Some 124 subjects, ages 17-79 (x = 56.30), 52% male, each performed 42 trials over road segments representing three levels of width crossed with 14 line-pavement contrast ratios. Lanekeeping performance was recorded in terms of heading error,(More)
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