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Previous Volume 352:196-197 January 13, 2005 Number 2 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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Policies can be very difficult to change, and advocates of change who claim a logical or scientific foundation need valid, reliable, and convincing data. An example of the process is the policy of regulating truck drivers' hours of service in order to reduce motor vehicle crashes. In 1935, Congress directed the Interstate Commerce Commission to establish hours-of-service rules for truckers. In 1938, despite a finding that no scientific basis had been provided, the commission established rules that limited driving to 10 hours in a 24-hour period and required a minimum of 8 consecutive off-duty hours within 24 hours. Weekly driving . . . [Full Text of this Article]

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From D. Wylie Associates, Santa Barbara, Calif.

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