No. 4: More car crashes occur after Daylight-Saving Time A study by researchers at the University of British Columbia at Vancouver analyzed Canadian traffic data between 1986 and 1995 and found an 8 percent increase in traffic accidents on the Monday after the switch to daylight saving time. A similar study published in 2001 analyzed 21 years of deadly auto collisions in the U.S. Authors Jason Varughese of Stanford University and Richard P. Allen of the Johns Hopkins University concluded: "The sleep deprivation on the Monday following the shift to daylight saving time in the spring results in a small increase in fatal accidents."
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