SkyExpress Inc. buses have been involved in four crashes, with one injury or fatality - the motor carrier agency didn't specify which - during the two-year period that ended May 20. Its drivers have been cited for 17 unsafe-driving violations, including eight for speeding, since 2009. That gives it worse marks than nearly 63 percent of comparable transportation companies in the agency's unsafe-driving category, which is separate from driver fatigue.
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